| blob | ad2d5f7f13d31b690e8eb89f18aec9278ea6be64 |
1 /* YACC parser for C syntax and for Objective C. -*-c-*-
2 Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996,
3 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
5 This file is part of GNU CC.
7 GNU CC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
10 any later version.
12 GNU CC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
22 /* This file defines the grammar of C and that of Objective C.
23 ifobjc ... end ifobjc conditionals contain code for Objective C only.
24 ifc ... end ifc conditionals contain code for C only.
25 Sed commands in Makefile.in are used to convert this file into
26 c-parse.y and into objc-parse.y. */
28 /* To whomever it may concern: I have heard that such a thing was once
29 written by AT&T, but I have never seen it. */
31 ifobjc
32 %expect 31
33 end ifobjc
34 ifc
35 %expect 10
36 end ifc
38 %{
39 #include "config.h"
40 #include "system.h"
41 #include <setjmp.h>
42 #include "tree.h"
43 #include "input.h"
44 #include "cpplib.h"
45 #include "intl.h"
46 #include "timevar.h"
47 #include "c-lex.h"
48 #include "c-tree.h"
49 #include "c-pragma.h"
50 #include "flags.h"
51 #include "output.h"
52 #include "toplev.h"
53 #include "ggc.h"
54 #include "diagnostic.h"
56 #ifdef MULTIBYTE_CHARS
57 #include <locale.h>
58 #endif
60 ifobjc
61 #include "objc-act.h"
62 end ifobjc
64 /* Since parsers are distinct for each language, put the language string
65 definition here. */
66 ifobjc
67 const char * const language_string = "GNU Objective-C";
68 end ifobjc
69 ifc
70 const char * const language_string = "GNU C";
71 end ifc
73 /* Like YYERROR but do call yyerror. */
74 #define YYERROR1 { yyerror ("syntax error"); YYERROR; }
76 /* Cause the "yydebug" variable to be defined. */
77 #define YYDEBUG 1
79 /* Rename the "yyparse" function so that we can override it elsewhere. */
80 #define yyparse yyparse_1
81 %}
83 %start program
85 %union {long itype; tree ttype; enum tree_code code;
86 const char *filename; int lineno; }
88 /* All identifiers that are not reserved words
89 and are not declared typedefs in the current block */
90 %token IDENTIFIER
92 /* All identifiers that are declared typedefs in the current block.
93 In some contexts, they are treated just like IDENTIFIER,
94 but they can also serve as typespecs in declarations. */
95 %token TYPENAME
97 /* Reserved words that specify storage class.
98 yylval contains an IDENTIFIER_NODE which indicates which one. */
99 %token SCSPEC
101 /* Reserved words that specify type.
102 yylval contains an IDENTIFIER_NODE which indicates which one. */
103 %token TYPESPEC
105 /* Reserved words that qualify type: "const", "volatile", or "restrict".
106 yylval contains an IDENTIFIER_NODE which indicates which one. */
107 %token TYPE_QUAL
109 /* Character or numeric constants.
110 yylval is the node for the constant. */
111 %token CONSTANT
113 /* String constants in raw form.
114 yylval is a STRING_CST node. */
115 %token STRING
117 /* "...", used for functions with variable arglists. */
118 %token ELLIPSIS
120 /* the reserved words */
121 /* SCO include files test "ASM", so use something else. */
122 %token SIZEOF ENUM STRUCT UNION IF ELSE WHILE DO FOR SWITCH CASE DEFAULT
123 %token BREAK CONTINUE RETURN GOTO ASM_KEYWORD TYPEOF ALIGNOF
124 %token ATTRIBUTE EXTENSION LABEL
125 %token REALPART IMAGPART VA_ARG
126 %token PTR_VALUE PTR_BASE PTR_EXTENT
128 /* function name can be a string const or a var decl. */
129 %token STRING_FUNC_NAME VAR_FUNC_NAME
131 /* Add precedence rules to solve dangling else s/r conflict */
132 %nonassoc IF
133 %nonassoc ELSE
135 /* Define the operator tokens and their precedences.
136 The value is an integer because, if used, it is the tree code
137 to use in the expression made from the operator. */
139 %right <code> ASSIGN '='
140 %right <code> '?' ':'
141 %left <code> OROR
142 %left <code> ANDAND
143 %left <code> '|'
144 %left <code> '^'
145 %left <code> '&'
146 %left <code> EQCOMPARE
147 %left <code> ARITHCOMPARE
148 %left <code> LSHIFT RSHIFT
149 %left <code> '+' '-'
150 %left <code> '*' '/' '%'
151 %right <code> UNARY PLUSPLUS MINUSMINUS
152 %left HYPERUNARY
153 %left <code> POINTSAT '.' '(' '['
155 /* The Objective-C keywords. These are included in C and in
156 Objective C, so that the token codes are the same in both. */
157 %token INTERFACE IMPLEMENTATION END SELECTOR DEFS ENCODE
158 %token CLASSNAME PUBLIC PRIVATE PROTECTED PROTOCOL OBJECTNAME CLASS ALIAS
160 %type <code> unop
161 %type <ttype> ENUM STRUCT UNION IF ELSE WHILE DO FOR SWITCH CASE DEFAULT
162 %type <ttype> BREAK CONTINUE RETURN GOTO ASM_KEYWORD SIZEOF TYPEOF ALIGNOF
164 %type <ttype> identifier IDENTIFIER TYPENAME CONSTANT expr nonnull_exprlist exprlist
165 %type <ttype> expr_no_commas cast_expr unary_expr primary string STRING
166 %type <ttype> declspecs_nosc_nots_nosa_noea declspecs_nosc_nots_nosa_ea
167 %type <ttype> declspecs_nosc_nots_sa_noea declspecs_nosc_nots_sa_ea
168 %type <ttype> declspecs_nosc_ts_nosa_noea declspecs_nosc_ts_nosa_ea
169 %type <ttype> declspecs_nosc_ts_sa_noea declspecs_nosc_ts_sa_ea
170 %type <ttype> declspecs_sc_nots_nosa_noea declspecs_sc_nots_nosa_ea
171 %type <ttype> declspecs_sc_nots_sa_noea declspecs_sc_nots_sa_ea
172 %type <ttype> declspecs_sc_ts_nosa_noea declspecs_sc_ts_nosa_ea
173 %type <ttype> declspecs_sc_ts_sa_noea declspecs_sc_ts_sa_ea
174 %type <ttype> declspecs_ts declspecs_nots
175 %type <ttype> declspecs_ts_nosa declspecs_nots_nosa
176 %type <ttype> declspecs_nosc_ts declspecs_nosc_nots declspecs_nosc declspecs
177 %type <ttype> maybe_type_quals_setattrs typespec_nonattr typespec_attr
178 %type <ttype> typespec_reserved_nonattr typespec_reserved_attr
179 %type <ttype> typespec_nonreserved_nonattr
181 %type <ttype> SCSPEC TYPESPEC TYPE_QUAL maybe_type_qual
182 %type <ttype> initdecls notype_initdecls initdcl notype_initdcl
183 %type <ttype> init maybeasm
184 %type <ttype> asm_operands nonnull_asm_operands asm_operand asm_clobbers
185 %type <ttype> maybe_attribute attributes attribute attribute_list attrib
186 %type <ttype> maybe_setattrs
187 %type <ttype> any_word extension
189 %type <ttype> compstmt compstmt_start compstmt_nostart compstmt_primary_start
190 %type <ttype> do_stmt_start poplevel stmt label
192 %type <ttype> c99_block_start c99_block_end
193 %type <ttype> declarator
194 %type <ttype> notype_declarator after_type_declarator
195 %type <ttype> parm_declarator
196 %type <ttype> parm_declarator_starttypename parm_declarator_nostarttypename
197 %type <ttype> array_declarator
199 %type <ttype> structsp_attr structsp_nonattr
200 %type <ttype> component_decl_list component_decl_list2
201 %type <ttype> component_decl components components_notype component_declarator
202 %type <ttype> component_notype_declarator
203 %type <ttype> enumlist enumerator
204 %type <ttype> struct_head union_head enum_head
205 %type <ttype> typename absdcl absdcl1 absdcl1_ea absdcl1_noea
206 %type <ttype> direct_absdcl1 absdcl_maybe_attribute
207 %type <ttype> xexpr parms parm firstparm identifiers
209 %type <ttype> parmlist parmlist_1 parmlist_2
210 %type <ttype> parmlist_or_identifiers parmlist_or_identifiers_1
211 %type <ttype> identifiers_or_typenames
213 %type <itype> setspecs setspecs_fp
215 %type <filename> save_filename
216 %type <lineno> save_lineno
217 \f
218 ifobjc
219 /* the Objective-C nonterminals */
221 %type <ttype> ivar_decl_list ivar_decls ivar_decl ivars ivar_declarator
222 %type <ttype> methoddecl unaryselector keywordselector selector
223 %type <ttype> keyworddecl receiver objcmessageexpr messageargs
224 %type <ttype> keywordexpr keywordarglist keywordarg
225 %type <ttype> myparms myparm optparmlist reservedwords objcselectorexpr
226 %type <ttype> selectorarg keywordnamelist keywordname objcencodeexpr
227 %type <ttype> objc_string non_empty_protocolrefs protocolrefs identifier_list objcprotocolexpr
229 %type <ttype> CLASSNAME OBJECTNAME
230 end ifobjc
231 \f
232 %{
233 /* Number of statements (loosely speaking) and compound statements
234 seen so far. */
235 static int stmt_count;
236 static int compstmt_count;
238 /* Input file and line number of the end of the body of last simple_if;
239 used by the stmt-rule immediately after simple_if returns. */
240 static const char *if_stmt_file;
241 static int if_stmt_line;
243 /* List of types and structure classes of the current declaration. */
244 static tree current_declspecs = NULL_TREE;
245 static tree prefix_attributes = NULL_TREE;
247 /* Stack of saved values of current_declspecs and prefix_attributes. */
248 static tree declspec_stack;
250 /* For __extension__, save/restore the warning flags which are
251 controlled by __extension__. */
252 #define SAVE_WARN_FLAGS() \
253 size_int (pedantic | (warn_pointer_arith << 1))
254 #define RESTORE_WARN_FLAGS(tval) \
255 do { \
256 int val = tree_low_cst (tval, 0); \
257 pedantic = val & 1; \
258 warn_pointer_arith = (val >> 1) & 1; \
259 } while (0)
261 ifobjc
262 /* Objective-C specific information */
264 tree objc_interface_context;
265 tree objc_implementation_context;
266 tree objc_method_context;
267 tree objc_ivar_chain;
268 tree objc_ivar_context;
269 enum tree_code objc_inherit_code;
270 int objc_receiver_context;
271 int objc_public_flag;
272 int objc_pq_context;
274 end ifobjc
276 /* Tell yyparse how to print a token's value, if yydebug is set. */
278 #define YYPRINT(FILE,YYCHAR,YYLVAL) yyprint(FILE,YYCHAR,YYLVAL)
280 static void yyprint PARAMS ((FILE *, int, YYSTYPE));
281 static void yyerror PARAMS ((const char *));
282 static int yylexname PARAMS ((void));
283 static inline int _yylex PARAMS ((void));
284 static int yylex PARAMS ((void));
285 static void init_reswords PARAMS ((void));
287 /* Add GC roots for variables local to this file. */
288 void
289 c_parse_init ()
290 {
291 ggc_add_tree_root (&declspec_stack, 1);
292 ggc_add_tree_root (¤t_declspecs, 1);
293 ggc_add_tree_root (&prefix_attributes, 1);
294 ifobjc
295 ggc_add_tree_root (&objc_interface_context, 1);
296 ggc_add_tree_root (&objc_implementation_context, 1);
297 ggc_add_tree_root (&objc_method_context, 1);
298 ggc_add_tree_root (&objc_ivar_chain, 1);
299 ggc_add_tree_root (&objc_ivar_context, 1);
300 end ifobjc
301 }
303 %}
304 \f
305 %%
306 program: /* empty */
307 { if (pedantic)
308 pedwarn ("ISO C forbids an empty source file");
309 finish_file ();
310 }
311 | extdefs
312 {
313 /* In case there were missing closebraces,
314 get us back to the global binding level. */
315 while (! global_bindings_p ())
316 poplevel (0, 0, 0);
317 ifc
318 finish_fname_decls ();
319 end ifc
320 finish_file ();
321 }
322 ;
324 /* the reason for the strange actions in this rule
325 is so that notype_initdecls when reached via datadef
326 can find a valid list of type and sc specs in $0. */
328 extdefs:
329 {$<ttype>$ = NULL_TREE; } extdef
330 | extdefs {$<ttype>$ = NULL_TREE; ggc_collect(); } extdef
331 ;
333 extdef:
334 fndef
335 | datadef
336 ifobjc
337 | objcdef
338 end ifobjc
339 | ASM_KEYWORD '(' expr ')' ';'
340 { STRIP_NOPS ($3);
341 if ((TREE_CODE ($3) == ADDR_EXPR
342 && TREE_CODE (TREE_OPERAND ($3, 0)) == STRING_CST)
343 || TREE_CODE ($3) == STRING_CST)
344 assemble_asm ($3);
345 else
346 error ("argument of `asm' is not a constant string"); }
347 | extension extdef
348 { RESTORE_WARN_FLAGS ($1); }
349 ;
351 datadef:
352 setspecs notype_initdecls ';'
353 { if (pedantic)
354 error ("ISO C forbids data definition with no type or storage class");
355 else if (!flag_traditional)
356 warning ("data definition has no type or storage class");
358 current_declspecs = TREE_VALUE (declspec_stack);
359 prefix_attributes = TREE_PURPOSE (declspec_stack);
360 declspec_stack = TREE_CHAIN (declspec_stack); }
361 | declspecs_nots setspecs notype_initdecls ';'
362 { current_declspecs = TREE_VALUE (declspec_stack);
363 prefix_attributes = TREE_PURPOSE (declspec_stack);
364 declspec_stack = TREE_CHAIN (declspec_stack); }
365 | declspecs_ts setspecs initdecls ';'
366 { current_declspecs = TREE_VALUE (declspec_stack);
367 prefix_attributes = TREE_PURPOSE (declspec_stack);
368 declspec_stack = TREE_CHAIN (declspec_stack); }
369 | declspecs ';'
370 { shadow_tag ($1); }
371 | error ';'
372 | error '}'
373 | ';'
374 { if (pedantic)
375 pedwarn ("ISO C does not allow extra `;' outside of a function"); }
376 ;
377 \f
378 fndef:
379 declspecs_ts setspecs declarator
380 { if (! start_function (current_declspecs, $3,
381 prefix_attributes))
382 YYERROR1;
383 }
384 old_style_parm_decls
385 { store_parm_decls (); }
386 save_filename save_lineno compstmt_or_error
387 { DECL_SOURCE_FILE (current_function_decl) = $7;
388 DECL_SOURCE_LINE (current_function_decl) = $8;
389 finish_function (0);
390 current_declspecs = TREE_VALUE (declspec_stack);
391 prefix_attributes = TREE_PURPOSE (declspec_stack);
392 declspec_stack = TREE_CHAIN (declspec_stack); }
393 | declspecs_ts setspecs declarator error
394 { current_declspecs = TREE_VALUE (declspec_stack);
395 prefix_attributes = TREE_PURPOSE (declspec_stack);
396 declspec_stack = TREE_CHAIN (declspec_stack); }
397 | declspecs_nots setspecs notype_declarator
398 { if (! start_function (current_declspecs, $3,
399 prefix_attributes))
400 YYERROR1;
401 }
402 old_style_parm_decls
403 { store_parm_decls (); }
404 save_filename save_lineno compstmt_or_error
405 { DECL_SOURCE_FILE (current_function_decl) = $7;
406 DECL_SOURCE_LINE (current_function_decl) = $8;
407 finish_function (0);
408 current_declspecs = TREE_VALUE (declspec_stack);
409 prefix_attributes = TREE_PURPOSE (declspec_stack);
410 declspec_stack = TREE_CHAIN (declspec_stack); }
411 | declspecs_nots setspecs notype_declarator error
412 { current_declspecs = TREE_VALUE (declspec_stack);
413 prefix_attributes = TREE_PURPOSE (declspec_stack);
414 declspec_stack = TREE_CHAIN (declspec_stack); }
415 | setspecs notype_declarator
416 { if (! start_function (NULL_TREE, $2,
417 prefix_attributes))
418 YYERROR1;
419 }
420 old_style_parm_decls
421 { store_parm_decls (); }
422 save_filename save_lineno compstmt_or_error
423 { DECL_SOURCE_FILE (current_function_decl) = $6;
424 DECL_SOURCE_LINE (current_function_decl) = $7;
425 finish_function (0);
426 current_declspecs = TREE_VALUE (declspec_stack);
427 prefix_attributes = TREE_PURPOSE (declspec_stack);
428 declspec_stack = TREE_CHAIN (declspec_stack); }
429 | setspecs notype_declarator error
430 { current_declspecs = TREE_VALUE (declspec_stack);
431 prefix_attributes = TREE_PURPOSE (declspec_stack);
432 declspec_stack = TREE_CHAIN (declspec_stack); }
433 ;
435 identifier:
436 IDENTIFIER
437 | TYPENAME
438 ifobjc
439 | OBJECTNAME
440 | CLASSNAME
441 end ifobjc
442 ;
444 unop: '&'
445 { $$ = ADDR_EXPR; }
446 | '-'
447 { $$ = NEGATE_EXPR; }
448 | '+'
449 { $$ = CONVERT_EXPR;
450 ifc
451 if (warn_traditional && !in_system_header)
452 warning ("traditional C rejects the unary plus operator");
453 end ifc
454 }
455 | PLUSPLUS
456 { $$ = PREINCREMENT_EXPR; }
457 | MINUSMINUS
458 { $$ = PREDECREMENT_EXPR; }
459 | '~'
460 { $$ = BIT_NOT_EXPR; }
461 | '!'
462 { $$ = TRUTH_NOT_EXPR; }
463 ;
465 expr: nonnull_exprlist
466 { $$ = build_compound_expr ($1); }
467 ;
469 exprlist:
470 /* empty */
471 { $$ = NULL_TREE; }
472 | nonnull_exprlist
473 ;
475 nonnull_exprlist:
476 expr_no_commas
477 { $$ = build_tree_list (NULL_TREE, $1); }
478 | nonnull_exprlist ',' expr_no_commas
479 { chainon ($1, build_tree_list (NULL_TREE, $3)); }
480 ;
482 unary_expr:
483 primary
484 | '*' cast_expr %prec UNARY
485 { $$ = build_indirect_ref ($2, "unary *"); }
486 /* __extension__ turns off -pedantic for following primary. */
487 | extension cast_expr %prec UNARY
488 { $$ = $2;
489 RESTORE_WARN_FLAGS ($1); }
490 | unop cast_expr %prec UNARY
491 { $$ = build_unary_op ($1, $2, 0);
492 overflow_warning ($$); }
493 /* Refer to the address of a label as a pointer. */
494 | ANDAND identifier
495 { $$ = finish_label_address_expr ($2); }
496 /* This seems to be impossible on some machines, so let's turn it off.
497 You can use __builtin_next_arg to find the anonymous stack args.
498 | '&' ELLIPSIS
499 { tree types = TYPE_ARG_TYPES (TREE_TYPE (current_function_decl));
500 $$ = error_mark_node;
501 if (TREE_VALUE (tree_last (types)) == void_type_node)
502 error ("`&...' used in function with fixed number of arguments");
503 else
504 {
505 if (pedantic)
506 pedwarn ("ISO C forbids `&...'");
507 $$ = tree_last (DECL_ARGUMENTS (current_function_decl));
508 $$ = build_unary_op (ADDR_EXPR, $$, 0);
509 } }
510 */
511 | sizeof unary_expr %prec UNARY
512 { skip_evaluation--;
513 if (TREE_CODE ($2) == COMPONENT_REF
514 && DECL_C_BIT_FIELD (TREE_OPERAND ($2, 1)))
515 error ("`sizeof' applied to a bit-field");
516 $$ = c_sizeof (TREE_TYPE ($2)); }
517 | sizeof '(' typename ')' %prec HYPERUNARY
518 { skip_evaluation--;
519 $$ = c_sizeof (groktypename ($3)); }
520 | alignof unary_expr %prec UNARY
521 { skip_evaluation--;
522 $$ = c_alignof_expr ($2); }
523 | alignof '(' typename ')' %prec HYPERUNARY
524 { skip_evaluation--;
525 $$ = c_alignof (groktypename ($3)); }
526 | REALPART cast_expr %prec UNARY
527 { $$ = build_unary_op (REALPART_EXPR, $2, 0); }
528 | IMAGPART cast_expr %prec UNARY
529 { $$ = build_unary_op (IMAGPART_EXPR, $2, 0); }
530 ;
532 sizeof:
533 SIZEOF { skip_evaluation++; }
534 ;
536 alignof:
537 ALIGNOF { skip_evaluation++; }
538 ;
540 cast_expr:
541 unary_expr
542 | '(' typename ')' cast_expr %prec UNARY
543 { $$ = c_cast_expr ($2, $4); }
544 ;
546 expr_no_commas:
547 cast_expr
548 | expr_no_commas '+' expr_no_commas
549 { $$ = parser_build_binary_op ($2, $1, $3); }
550 | expr_no_commas '-' expr_no_commas
551 { $$ = parser_build_binary_op ($2, $1, $3); }
552 | expr_no_commas '*' expr_no_commas
553 { $$ = parser_build_binary_op ($2, $1, $3); }
554 | expr_no_commas '/' expr_no_commas
555 { $$ = parser_build_binary_op ($2, $1, $3); }
556 | expr_no_commas '%' expr_no_commas
557 { $$ = parser_build_binary_op ($2, $1, $3); }
558 | expr_no_commas LSHIFT expr_no_commas
559 { $$ = parser_build_binary_op ($2, $1, $3); }
560 | expr_no_commas RSHIFT expr_no_commas
561 { $$ = parser_build_binary_op ($2, $1, $3); }
562 | expr_no_commas ARITHCOMPARE expr_no_commas
563 { $$ = parser_build_binary_op ($2, $1, $3); }
564 | expr_no_commas EQCOMPARE expr_no_commas
565 { $$ = parser_build_binary_op ($2, $1, $3); }
566 | expr_no_commas '&' expr_no_commas
567 { $$ = parser_build_binary_op ($2, $1, $3); }
568 | expr_no_commas '|' expr_no_commas
569 { $$ = parser_build_binary_op ($2, $1, $3); }
570 | expr_no_commas '^' expr_no_commas
571 { $$ = parser_build_binary_op ($2, $1, $3); }
572 | expr_no_commas ANDAND
573 { $1 = truthvalue_conversion (default_conversion ($1));
574 skip_evaluation += $1 == boolean_false_node; }
575 expr_no_commas
576 { skip_evaluation -= $1 == boolean_false_node;
577 $$ = parser_build_binary_op (TRUTH_ANDIF_EXPR, $1, $4); }
578 | expr_no_commas OROR
579 { $1 = truthvalue_conversion (default_conversion ($1));
580 skip_evaluation += $1 == boolean_true_node; }
581 expr_no_commas
582 { skip_evaluation -= $1 == boolean_true_node;
583 $$ = parser_build_binary_op (TRUTH_ORIF_EXPR, $1, $4); }
584 | expr_no_commas '?'
585 { $1 = truthvalue_conversion (default_conversion ($1));
586 skip_evaluation += $1 == boolean_false_node; }
587 expr ':'
588 { skip_evaluation += (($1 == boolean_true_node)
589 - ($1 == boolean_false_node)); }
590 expr_no_commas
591 { skip_evaluation -= $1 == boolean_true_node;
592 $$ = build_conditional_expr ($1, $4, $7); }
593 | expr_no_commas '?'
594 { if (pedantic)
595 pedwarn ("ISO C forbids omitting the middle term of a ?: expression");
596 /* Make sure first operand is calculated only once. */
597 $<ttype>2 = save_expr ($1);
598 $1 = truthvalue_conversion (default_conversion ($<ttype>2));
599 skip_evaluation += $1 == boolean_true_node; }
600 ':' expr_no_commas
601 { skip_evaluation -= $1 == boolean_true_node;
602 $$ = build_conditional_expr ($1, $<ttype>2, $5); }
603 | expr_no_commas '=' expr_no_commas
604 { char class;
605 $$ = build_modify_expr ($1, NOP_EXPR, $3);
606 class = TREE_CODE_CLASS (TREE_CODE ($$));
607 if (class == 'e' || class == '1'
608 || class == '2' || class == '<')
609 C_SET_EXP_ORIGINAL_CODE ($$, MODIFY_EXPR);
610 }
611 | expr_no_commas ASSIGN expr_no_commas
612 { char class;
613 $$ = build_modify_expr ($1, $2, $3);
614 /* This inhibits warnings in truthvalue_conversion. */
615 class = TREE_CODE_CLASS (TREE_CODE ($$));
616 if (class == 'e' || class == '1'
617 || class == '2' || class == '<')
618 C_SET_EXP_ORIGINAL_CODE ($$, ERROR_MARK);
619 }
620 ;
622 primary:
623 IDENTIFIER
624 {
625 if (yychar == YYEMPTY)
626 yychar = YYLEX;
627 $$ = build_external_ref ($1, yychar == '(');
628 }
629 | CONSTANT
630 | string
631 { $$ = combine_strings ($1); }
632 | VAR_FUNC_NAME
633 { $$ = fname_decl (C_RID_CODE ($$), $$); }
634 | '(' typename ')' '{'
635 { start_init (NULL_TREE, NULL, 0);
636 $2 = groktypename ($2);
637 really_start_incremental_init ($2); }
638 initlist_maybe_comma '}' %prec UNARY
639 { const char *name;
640 tree result = pop_init_level (0);
641 tree type = $2;
642 finish_init ();
644 if (pedantic && ! flag_isoc99)
645 pedwarn ("ISO C89 forbids compound literals");
646 if (TYPE_NAME (type) != 0)
647 {
648 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
649 name = IDENTIFIER_POINTER (TYPE_NAME (type));
650 else
651 name = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (type)));
652 }
653 else
654 name = "";
655 $$ = result;
656 if (TREE_CODE (type) == ARRAY_TYPE && !COMPLETE_TYPE_P (type))
657 {
658 int failure = complete_array_type (type, $$, 1);
659 if (failure)
660 abort ();
661 }
662 }
663 | '(' expr ')'
664 { char class = TREE_CODE_CLASS (TREE_CODE ($2));
665 if (class == 'e' || class == '1'
666 || class == '2' || class == '<')
667 C_SET_EXP_ORIGINAL_CODE ($2, ERROR_MARK);
668 $$ = $2; }
669 | '(' error ')'
670 { $$ = error_mark_node; }
671 | compstmt_primary_start compstmt_nostart ')'
672 { tree saved_last_tree;
674 if (pedantic)
675 pedwarn ("ISO C forbids braced-groups within expressions");
676 pop_label_level ();
678 saved_last_tree = COMPOUND_BODY ($1);
679 RECHAIN_STMTS ($1, COMPOUND_BODY ($1));
680 last_tree = saved_last_tree;
681 TREE_CHAIN (last_tree) = NULL_TREE;
682 if (!last_expr_type)
683 last_expr_type = void_type_node;
684 $$ = build1 (STMT_EXPR, last_expr_type, $1);
685 TREE_SIDE_EFFECTS ($$) = 1;
686 }
687 | compstmt_primary_start error ')'
688 {
689 pop_label_level ();
690 last_tree = COMPOUND_BODY ($1);
691 TREE_CHAIN (last_tree) = NULL_TREE;
692 $$ = error_mark_node;
693 }
694 | primary '(' exprlist ')' %prec '.'
695 { $$ = build_function_call ($1, $3); }
696 | VA_ARG '(' expr_no_commas ',' typename ')'
697 { $$ = build_va_arg ($3, groktypename ($5)); }
698 | primary '[' expr ']' %prec '.'
699 { $$ = build_array_ref ($1, $3); }
700 | primary '.' identifier
701 {
702 ifobjc
703 if (!is_public ($1, $3))
704 $$ = error_mark_node;
705 else
706 end ifobjc
707 $$ = build_component_ref ($1, $3);
708 }
709 | primary POINTSAT identifier
710 {
711 tree expr = build_indirect_ref ($1, "->");
713 ifobjc
714 if (!is_public (expr, $3))
715 $$ = error_mark_node;
716 else
717 end ifobjc
718 $$ = build_component_ref (expr, $3);
719 }
720 | primary PLUSPLUS
721 { $$ = build_unary_op (POSTINCREMENT_EXPR, $1, 0); }
722 | primary MINUSMINUS
723 { $$ = build_unary_op (POSTDECREMENT_EXPR, $1, 0); }
724 ifobjc
725 | objcmessageexpr
726 { $$ = build_message_expr ($1); }
727 | objcselectorexpr
728 { $$ = build_selector_expr ($1); }
729 | objcprotocolexpr
730 { $$ = build_protocol_expr ($1); }
731 | objcencodeexpr
732 { $$ = build_encode_expr ($1); }
733 | objc_string
734 { $$ = build_objc_string_object ($1); }
735 end ifobjc
736 ;
738 /* Produces a STRING_CST with perhaps more STRING_CSTs chained onto it. */
739 string:
740 STRING
741 | string STRING
742 {
743 ifc
744 static int last_lineno = 0;
745 static const char *last_input_filename = 0;
746 end ifc
747 $$ = chainon ($1, $2);
748 ifc
749 if (warn_traditional && !in_system_header
750 && (lineno != last_lineno || !last_input_filename ||
751 strcmp (last_input_filename, input_filename)))
752 {
753 warning ("traditional C rejects string concatenation");
754 last_lineno = lineno;
755 last_input_filename = input_filename;
756 }
757 end ifc
758 }
759 ;
761 ifobjc
762 /* Produces an STRING_CST with perhaps more STRING_CSTs chained
763 onto it, which is to be read as an ObjC string object. */
764 objc_string:
765 '@' STRING
766 { $$ = $2; }
767 | objc_string '@' STRING
768 { $$ = chainon ($1, $3); }
769 ;
770 end ifobjc
772 old_style_parm_decls:
773 /* empty */
774 | datadecls
775 | datadecls ELLIPSIS
776 /* ... is used here to indicate a varargs function. */
777 { c_mark_varargs ();
778 if (pedantic)
779 pedwarn ("ISO C does not permit use of `varargs.h'"); }
780 ;
782 /* The following are analogous to lineno_decl, decls and decl
783 except that they do not allow nested functions.
784 They are used for old-style parm decls. */
785 lineno_datadecl:
786 save_filename save_lineno datadecl
787 { }
788 ;
790 datadecls:
791 lineno_datadecl
792 | errstmt
793 | datadecls lineno_datadecl
794 | lineno_datadecl errstmt
795 ;
797 /* We don't allow prefix attributes here because they cause reduce/reduce
798 conflicts: we can't know whether we're parsing a function decl with
799 attribute suffix, or function defn with attribute prefix on first old
800 style parm. */
801 datadecl:
802 declspecs_ts_nosa setspecs initdecls ';'
803 { current_declspecs = TREE_VALUE (declspec_stack);
804 prefix_attributes = TREE_PURPOSE (declspec_stack);
805 declspec_stack = TREE_CHAIN (declspec_stack); }
806 | declspecs_nots_nosa setspecs notype_initdecls ';'
807 { current_declspecs = TREE_VALUE (declspec_stack);
808 prefix_attributes = TREE_PURPOSE (declspec_stack);
809 declspec_stack = TREE_CHAIN (declspec_stack); }
810 | declspecs_ts_nosa ';'
811 { shadow_tag_warned ($1, 1);
812 pedwarn ("empty declaration"); }
813 | declspecs_nots_nosa ';'
814 { pedwarn ("empty declaration"); }
815 ;
817 /* This combination which saves a lineno before a decl
818 is the normal thing to use, rather than decl itself.
819 This is to avoid shift/reduce conflicts in contexts
820 where statement labels are allowed. */
821 lineno_decl:
822 save_filename save_lineno decl
823 { }
824 ;
826 /* records the type and storage class specs to use for processing
827 the declarators that follow.
828 Maintains a stack of outer-level values of current_declspecs,
829 for the sake of parm declarations nested in function declarators. */
830 setspecs: /* empty */
831 { pending_xref_error ();
832 declspec_stack = tree_cons (prefix_attributes,
833 current_declspecs,
834 declspec_stack);
835 split_specs_attrs ($<ttype>0,
836 ¤t_declspecs, &prefix_attributes); }
837 ;
839 /* ??? Yuck. See maybe_setattrs. */
840 setattrs: /* empty */
841 { prefix_attributes = chainon (prefix_attributes, $<ttype>0); }
842 ;
844 maybe_setattrs:
845 /* ??? Yuck. setattrs is a quick hack. We can't use
846 prefix_attributes because $1 only applies to this
847 declarator. We assume setspecs has already been done.
848 setattrs also avoids 5 reduce/reduce conflicts (otherwise multiple
849 attributes could be recognized here or in `attributes').
850 Properly attributes ought to be able to apply to any level of
851 nested declarator, but the necessary compiler support isn't
852 present, so the attributes apply to a declaration (which may be
853 nested). */
854 maybe_attribute setattrs
855 ;
857 decl:
858 declspecs_ts setspecs initdecls ';'
859 { current_declspecs = TREE_VALUE (declspec_stack);
860 prefix_attributes = TREE_PURPOSE (declspec_stack);
861 declspec_stack = TREE_CHAIN (declspec_stack); }
862 | declspecs_nots setspecs notype_initdecls ';'
863 { current_declspecs = TREE_VALUE (declspec_stack);
864 prefix_attributes = TREE_PURPOSE (declspec_stack);
865 declspec_stack = TREE_CHAIN (declspec_stack); }
866 | declspecs_ts setspecs nested_function
867 { current_declspecs = TREE_VALUE (declspec_stack);
868 prefix_attributes = TREE_PURPOSE (declspec_stack);
869 declspec_stack = TREE_CHAIN (declspec_stack); }
870 | declspecs_nots setspecs notype_nested_function
871 { current_declspecs = TREE_VALUE (declspec_stack);
872 prefix_attributes = TREE_PURPOSE (declspec_stack);
873 declspec_stack = TREE_CHAIN (declspec_stack); }
874 | declspecs ';'
875 { shadow_tag ($1); }
876 | extension decl
877 { RESTORE_WARN_FLAGS ($1); }
878 ;
880 /* A list of declaration specifiers. These are:
882 - Storage class specifiers (SCSPEC), which for GCC currently include
883 function specifiers ("inline").
885 - Type specifiers (typespec_*).
887 - Type qualifiers (TYPE_QUAL).
889 - Attribute specifier lists (attributes).
891 These are stored as a TREE_LIST; the head of the list is the last
892 item in the specifier list. Each entry in the list has either a
893 TREE_PURPOSE that is an attribute specifier list, or a TREE_VALUE that
894 is a single other specifier or qualifier; and a TREE_CHAIN that is the
895 rest of the list. TREE_STATIC is set on the list if something other
896 than a storage class specifier or attribute has been seen; this is used
897 to warn for the obsolescent usage of storage class specifiers other than
898 at the start of the list. (Doing this properly would require function
899 specifiers to be handled separately from storage class specifiers.)
901 The various cases below are classified according to:
903 (a) Whether a storage class specifier is included or not; some
904 places in the grammar disallow storage class specifiers (_sc or _nosc).
906 (b) Whether a type specifier has been seen; after a type specifier,
907 a typedef name is an identifier to redeclare (_ts or _nots).
909 (c) Whether the list starts with an attribute; in certain places,
910 the grammar requires specifiers that don't start with an attribute
911 (_sa or _nosa).
913 (d) Whether the list ends with an attribute (or a specifier such that
914 any following attribute would have been parsed as part of that specifier);
915 this avoids shift-reduce conflicts in the parsing of attributes
916 (_ea or _noea).
918 TODO:
920 (i) Distinguish between function specifiers and storage class specifiers,
921 at least for the purpose of warnings about obsolescent usage.
923 (ii) Halve the number of productions here by eliminating the _sc/_nosc
924 distinction and instead checking where required that storage class
925 specifiers aren't present. */
927 /* Declspecs which contain at least one type specifier or typedef name.
928 (Just `const' or `volatile' is not enough.)
929 A typedef'd name following these is taken as a name to be declared.
930 Declspecs have a non-NULL TREE_VALUE, attributes do not. */
932 declspecs_nosc_nots_nosa_noea:
933 TYPE_QUAL
934 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
935 TREE_STATIC ($$) = 1; }
936 | declspecs_nosc_nots_nosa_noea TYPE_QUAL
937 { $$ = tree_cons (NULL_TREE, $2, $1);
938 TREE_STATIC ($$) = 1; }
939 | declspecs_nosc_nots_nosa_ea TYPE_QUAL
940 { $$ = tree_cons (NULL_TREE, $2, $1);
941 TREE_STATIC ($$) = 1; }
942 ;
944 declspecs_nosc_nots_nosa_ea:
945 declspecs_nosc_nots_nosa_noea attributes
946 { $$ = tree_cons ($2, NULL_TREE, $1);
947 TREE_STATIC ($$) = TREE_STATIC ($1); }
948 ;
950 declspecs_nosc_nots_sa_noea:
951 declspecs_nosc_nots_sa_noea TYPE_QUAL
952 { $$ = tree_cons (NULL_TREE, $2, $1);
953 TREE_STATIC ($$) = 1; }
954 | declspecs_nosc_nots_sa_ea TYPE_QUAL
955 { $$ = tree_cons (NULL_TREE, $2, $1);
956 TREE_STATIC ($$) = 1; }
957 ;
959 declspecs_nosc_nots_sa_ea:
960 attributes
961 { $$ = tree_cons ($1, NULL_TREE, NULL_TREE);
962 TREE_STATIC ($$) = 0; }
963 | declspecs_nosc_nots_sa_noea attributes
964 { $$ = tree_cons ($2, NULL_TREE, $1);
965 TREE_STATIC ($$) = TREE_STATIC ($1); }
966 ;
968 declspecs_nosc_ts_nosa_noea:
969 typespec_nonattr
970 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
971 TREE_STATIC ($$) = 1; }
972 | declspecs_nosc_ts_nosa_noea TYPE_QUAL
973 { $$ = tree_cons (NULL_TREE, $2, $1);
974 TREE_STATIC ($$) = 1; }
975 | declspecs_nosc_ts_nosa_ea TYPE_QUAL
976 { $$ = tree_cons (NULL_TREE, $2, $1);
977 TREE_STATIC ($$) = 1; }
978 | declspecs_nosc_ts_nosa_noea typespec_reserved_nonattr
979 { $$ = tree_cons (NULL_TREE, $2, $1);
980 TREE_STATIC ($$) = 1; }
981 | declspecs_nosc_ts_nosa_ea typespec_reserved_nonattr
982 { $$ = tree_cons (NULL_TREE, $2, $1);
983 TREE_STATIC ($$) = 1; }
984 | declspecs_nosc_nots_nosa_noea typespec_nonattr
985 { $$ = tree_cons (NULL_TREE, $2, $1);
986 TREE_STATIC ($$) = 1; }
987 | declspecs_nosc_nots_nosa_ea typespec_nonattr
988 { $$ = tree_cons (NULL_TREE, $2, $1);
989 TREE_STATIC ($$) = 1; }
990 ;
992 declspecs_nosc_ts_nosa_ea:
993 typespec_attr
994 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
995 TREE_STATIC ($$) = 1; }
996 | declspecs_nosc_ts_nosa_noea attributes
997 { $$ = tree_cons ($2, NULL_TREE, $1);
998 TREE_STATIC ($$) = TREE_STATIC ($1); }
999 | declspecs_nosc_ts_nosa_noea typespec_reserved_attr
1000 { $$ = tree_cons (NULL_TREE, $2, $1);
1001 TREE_STATIC ($$) = 1; }
1002 | declspecs_nosc_ts_nosa_ea typespec_reserved_attr
1003 { $$ = tree_cons (NULL_TREE, $2, $1);
1004 TREE_STATIC ($$) = 1; }
1005 | declspecs_nosc_nots_nosa_noea typespec_attr
1006 { $$ = tree_cons (NULL_TREE, $2, $1);
1007 TREE_STATIC ($$) = 1; }
1008 | declspecs_nosc_nots_nosa_ea typespec_attr
1009 { $$ = tree_cons (NULL_TREE, $2, $1);
1010 TREE_STATIC ($$) = 1; }
1011 ;
1013 declspecs_nosc_ts_sa_noea:
1014 declspecs_nosc_ts_sa_noea TYPE_QUAL
1015 { $$ = tree_cons (NULL_TREE, $2, $1);
1016 TREE_STATIC ($$) = 1; }
1017 | declspecs_nosc_ts_sa_ea TYPE_QUAL
1018 { $$ = tree_cons (NULL_TREE, $2, $1);
1019 TREE_STATIC ($$) = 1; }
1020 | declspecs_nosc_ts_sa_noea typespec_reserved_nonattr
1021 { $$ = tree_cons (NULL_TREE, $2, $1);
1022 TREE_STATIC ($$) = 1; }
1023 | declspecs_nosc_ts_sa_ea typespec_reserved_nonattr
1024 { $$ = tree_cons (NULL_TREE, $2, $1);
1025 TREE_STATIC ($$) = 1; }
1026 | declspecs_nosc_nots_sa_noea typespec_nonattr
1027 { $$ = tree_cons (NULL_TREE, $2, $1);
1028 TREE_STATIC ($$) = 1; }
1029 | declspecs_nosc_nots_sa_ea typespec_nonattr
1030 { $$ = tree_cons (NULL_TREE, $2, $1);
1031 TREE_STATIC ($$) = 1; }
1032 ;
1034 declspecs_nosc_ts_sa_ea:
1035 declspecs_nosc_ts_sa_noea attributes
1036 { $$ = tree_cons ($2, NULL_TREE, $1);
1037 TREE_STATIC ($$) = TREE_STATIC ($1); }
1038 | declspecs_nosc_ts_sa_noea typespec_reserved_attr
1039 { $$ = tree_cons (NULL_TREE, $2, $1);
1040 TREE_STATIC ($$) = 1; }
1041 | declspecs_nosc_ts_sa_ea typespec_reserved_attr
1042 { $$ = tree_cons (NULL_TREE, $2, $1);
1043 TREE_STATIC ($$) = 1; }
1044 | declspecs_nosc_nots_sa_noea typespec_attr
1045 { $$ = tree_cons (NULL_TREE, $2, $1);
1046 TREE_STATIC ($$) = 1; }
1047 | declspecs_nosc_nots_sa_ea typespec_attr
1048 { $$ = tree_cons (NULL_TREE, $2, $1);
1049 TREE_STATIC ($$) = 1; }
1050 ;
1052 declspecs_sc_nots_nosa_noea:
1053 SCSPEC
1054 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
1055 TREE_STATIC ($$) = 0; }
1056 | declspecs_sc_nots_nosa_noea TYPE_QUAL
1057 { $$ = tree_cons (NULL_TREE, $2, $1);
1058 TREE_STATIC ($$) = 1; }
1059 | declspecs_sc_nots_nosa_ea TYPE_QUAL
1060 { $$ = tree_cons (NULL_TREE, $2, $1);
1061 TREE_STATIC ($$) = 1; }
1062 | declspecs_nosc_nots_nosa_noea SCSPEC
1063 { if (extra_warnings && TREE_STATIC ($1))
1064 warning ("`%s' is not at beginning of declaration",
1065 IDENTIFIER_POINTER ($2));
1066 $$ = tree_cons (NULL_TREE, $2, $1);
1067 TREE_STATIC ($$) = TREE_STATIC ($1); }
1068 | declspecs_nosc_nots_nosa_ea SCSPEC
1069 { if (extra_warnings && TREE_STATIC ($1))
1070 warning ("`%s' is not at beginning of declaration",
1071 IDENTIFIER_POINTER ($2));
1072 $$ = tree_cons (NULL_TREE, $2, $1);
1073 TREE_STATIC ($$) = TREE_STATIC ($1); }
1074 | declspecs_sc_nots_nosa_noea SCSPEC
1075 { if (extra_warnings && TREE_STATIC ($1))
1076 warning ("`%s' is not at beginning of declaration",
1077 IDENTIFIER_POINTER ($2));
1078 $$ = tree_cons (NULL_TREE, $2, $1);
1079 TREE_STATIC ($$) = TREE_STATIC ($1); }
1080 | declspecs_sc_nots_nosa_ea SCSPEC
1081 { if (extra_warnings && TREE_STATIC ($1))
1082 warning ("`%s' is not at beginning of declaration",
1083 IDENTIFIER_POINTER ($2));
1084 $$ = tree_cons (NULL_TREE, $2, $1);
1085 TREE_STATIC ($$) = TREE_STATIC ($1); }
1086 ;
1088 declspecs_sc_nots_nosa_ea:
1089 declspecs_sc_nots_nosa_noea attributes
1090 { $$ = tree_cons ($2, NULL_TREE, $1);
1091 TREE_STATIC ($$) = TREE_STATIC ($1); }
1092 ;
1094 declspecs_sc_nots_sa_noea:
1095 declspecs_sc_nots_sa_noea TYPE_QUAL
1096 { $$ = tree_cons (NULL_TREE, $2, $1);
1097 TREE_STATIC ($$) = 1; }
1098 | declspecs_sc_nots_sa_ea TYPE_QUAL
1099 { $$ = tree_cons (NULL_TREE, $2, $1);
1100 TREE_STATIC ($$) = 1; }
1101 | declspecs_nosc_nots_sa_noea SCSPEC
1102 { if (extra_warnings && TREE_STATIC ($1))
1103 warning ("`%s' is not at beginning of declaration",
1104 IDENTIFIER_POINTER ($2));
1105 $$ = tree_cons (NULL_TREE, $2, $1);
1106 TREE_STATIC ($$) = TREE_STATIC ($1); }
1107 | declspecs_nosc_nots_sa_ea SCSPEC
1108 { if (extra_warnings && TREE_STATIC ($1))
1109 warning ("`%s' is not at beginning of declaration",
1110 IDENTIFIER_POINTER ($2));
1111 $$ = tree_cons (NULL_TREE, $2, $1);
1112 TREE_STATIC ($$) = TREE_STATIC ($1); }
1113 | declspecs_sc_nots_sa_noea SCSPEC
1114 { if (extra_warnings && TREE_STATIC ($1))
1115 warning ("`%s' is not at beginning of declaration",
1116 IDENTIFIER_POINTER ($2));
1117 $$ = tree_cons (NULL_TREE, $2, $1);
1118 TREE_STATIC ($$) = TREE_STATIC ($1); }
1119 | declspecs_sc_nots_sa_ea SCSPEC
1120 { if (extra_warnings && TREE_STATIC ($1))
1121 warning ("`%s' is not at beginning of declaration",
1122 IDENTIFIER_POINTER ($2));
1123 $$ = tree_cons (NULL_TREE, $2, $1);
1124 TREE_STATIC ($$) = TREE_STATIC ($1); }
1125 ;
1127 declspecs_sc_nots_sa_ea:
1128 declspecs_sc_nots_sa_noea attributes
1129 { $$ = tree_cons ($2, NULL_TREE, $1);
1130 TREE_STATIC ($$) = TREE_STATIC ($1); }
1131 ;
1133 declspecs_sc_ts_nosa_noea:
1134 declspecs_sc_ts_nosa_noea TYPE_QUAL
1135 { $$ = tree_cons (NULL_TREE, $2, $1);
1136 TREE_STATIC ($$) = 1; }
1137 | declspecs_sc_ts_nosa_ea TYPE_QUAL
1138 { $$ = tree_cons (NULL_TREE, $2, $1);
1139 TREE_STATIC ($$) = 1; }
1140 | declspecs_sc_ts_nosa_noea typespec_reserved_nonattr
1141 { $$ = tree_cons (NULL_TREE, $2, $1);
1142 TREE_STATIC ($$) = 1; }
1143 | declspecs_sc_ts_nosa_ea typespec_reserved_nonattr
1144 { $$ = tree_cons (NULL_TREE, $2, $1);
1145 TREE_STATIC ($$) = 1; }
1146 | declspecs_sc_nots_nosa_noea typespec_nonattr
1147 { $$ = tree_cons (NULL_TREE, $2, $1);
1148 TREE_STATIC ($$) = 1; }
1149 | declspecs_sc_nots_nosa_ea typespec_nonattr
1150 { $$ = tree_cons (NULL_TREE, $2, $1);
1151 TREE_STATIC ($$) = 1; }
1152 | declspecs_nosc_ts_nosa_noea SCSPEC
1153 { if (extra_warnings && TREE_STATIC ($1))
1154 warning ("`%s' is not at beginning of declaration",
1155 IDENTIFIER_POINTER ($2));
1156 $$ = tree_cons (NULL_TREE, $2, $1);
1157 TREE_STATIC ($$) = TREE_STATIC ($1); }
1158 | declspecs_nosc_ts_nosa_ea SCSPEC
1159 { if (extra_warnings && TREE_STATIC ($1))
1160 warning ("`%s' is not at beginning of declaration",
1161 IDENTIFIER_POINTER ($2));
1162 $$ = tree_cons (NULL_TREE, $2, $1);
1163 TREE_STATIC ($$) = TREE_STATIC ($1); }
1164 | declspecs_sc_ts_nosa_noea SCSPEC
1165 { if (extra_warnings && TREE_STATIC ($1))
1166 warning ("`%s' is not at beginning of declaration",
1167 IDENTIFIER_POINTER ($2));
1168 $$ = tree_cons (NULL_TREE, $2, $1);
1169 TREE_STATIC ($$) = TREE_STATIC ($1); }
1170 | declspecs_sc_ts_nosa_ea SCSPEC
1171 { if (extra_warnings && TREE_STATIC ($1))
1172 warning ("`%s' is not at beginning of declaration",
1173 IDENTIFIER_POINTER ($2));
1174 $$ = tree_cons (NULL_TREE, $2, $1);
1175 TREE_STATIC ($$) = TREE_STATIC ($1); }
1176 ;
1178 declspecs_sc_ts_nosa_ea:
1179 declspecs_sc_ts_nosa_noea attributes
1180 { $$ = tree_cons ($2, NULL_TREE, $1);
1181 TREE_STATIC ($$) = TREE_STATIC ($1); }
1182 | declspecs_sc_ts_nosa_noea typespec_reserved_attr
1183 { $$ = tree_cons (NULL_TREE, $2, $1);
1184 TREE_STATIC ($$) = 1; }
1185 | declspecs_sc_ts_nosa_ea typespec_reserved_attr
1186 { $$ = tree_cons (NULL_TREE, $2, $1);
1187 TREE_STATIC ($$) = 1; }
1188 | declspecs_sc_nots_nosa_noea typespec_attr
1189 { $$ = tree_cons (NULL_TREE, $2, $1);
1190 TREE_STATIC ($$) = 1; }
1191 | declspecs_sc_nots_nosa_ea typespec_attr
1192 { $$ = tree_cons (NULL_TREE, $2, $1);
1193 TREE_STATIC ($$) = 1; }
1194 ;
1196 declspecs_sc_ts_sa_noea:
1197 declspecs_sc_ts_sa_noea TYPE_QUAL
1198 { $$ = tree_cons (NULL_TREE, $2, $1);
1199 TREE_STATIC ($$) = 1; }
1200 | declspecs_sc_ts_sa_ea TYPE_QUAL
1201 { $$ = tree_cons (NULL_TREE, $2, $1);
1202 TREE_STATIC ($$) = 1; }
1203 | declspecs_sc_ts_sa_noea typespec_reserved_nonattr
1204 { $$ = tree_cons (NULL_TREE, $2, $1);
1205 TREE_STATIC ($$) = 1; }
1206 | declspecs_sc_ts_sa_ea typespec_reserved_nonattr
1207 { $$ = tree_cons (NULL_TREE, $2, $1);
1208 TREE_STATIC ($$) = 1; }
1209 | declspecs_sc_nots_sa_noea typespec_nonattr
1210 { $$ = tree_cons (NULL_TREE, $2, $1);
1211 TREE_STATIC ($$) = 1; }
1212 | declspecs_sc_nots_sa_ea typespec_nonattr
1213 { $$ = tree_cons (NULL_TREE, $2, $1);
1214 TREE_STATIC ($$) = 1; }
1215 | declspecs_nosc_ts_sa_noea SCSPEC
1216 { if (extra_warnings && TREE_STATIC ($1))
1217 warning ("`%s' is not at beginning of declaration",
1218 IDENTIFIER_POINTER ($2));
1219 $$ = tree_cons (NULL_TREE, $2, $1);
1220 TREE_STATIC ($$) = TREE_STATIC ($1); }
1221 | declspecs_nosc_ts_sa_ea SCSPEC
1222 { if (extra_warnings && TREE_STATIC ($1))
1223 warning ("`%s' is not at beginning of declaration",
1224 IDENTIFIER_POINTER ($2));
1225 $$ = tree_cons (NULL_TREE, $2, $1);
1226 TREE_STATIC ($$) = TREE_STATIC ($1); }
1227 | declspecs_sc_ts_sa_noea SCSPEC
1228 { if (extra_warnings && TREE_STATIC ($1))
1229 warning ("`%s' is not at beginning of declaration",
1230 IDENTIFIER_POINTER ($2));
1231 $$ = tree_cons (NULL_TREE, $2, $1);
1232 TREE_STATIC ($$) = TREE_STATIC ($1); }
1233 | declspecs_sc_ts_sa_ea SCSPEC
1234 { if (extra_warnings && TREE_STATIC ($1))
1235 warning ("`%s' is not at beginning of declaration",
1236 IDENTIFIER_POINTER ($2));
1237 $$ = tree_cons (NULL_TREE, $2, $1);
1238 TREE_STATIC ($$) = TREE_STATIC ($1); }
1239 ;
1241 declspecs_sc_ts_sa_ea:
1242 declspecs_sc_ts_sa_noea attributes
1243 { $$ = tree_cons ($2, NULL_TREE, $1);
1244 TREE_STATIC ($$) = TREE_STATIC ($1); }
1245 | declspecs_sc_ts_sa_noea typespec_reserved_attr
1246 { $$ = tree_cons (NULL_TREE, $2, $1);
1247 TREE_STATIC ($$) = 1; }
1248 | declspecs_sc_ts_sa_ea typespec_reserved_attr
1249 { $$ = tree_cons (NULL_TREE, $2, $1);
1250 TREE_STATIC ($$) = 1; }
1251 | declspecs_sc_nots_sa_noea typespec_attr
1252 { $$ = tree_cons (NULL_TREE, $2, $1);
1253 TREE_STATIC ($$) = 1; }
1254 | declspecs_sc_nots_sa_ea typespec_attr
1255 { $$ = tree_cons (NULL_TREE, $2, $1);
1256 TREE_STATIC ($$) = 1; }
1257 ;
1259 /* Particular useful classes of declspecs. */
1260 declspecs_ts:
1261 declspecs_nosc_ts_nosa_noea
1262 | declspecs_nosc_ts_nosa_ea
1263 | declspecs_nosc_ts_sa_noea
1264 | declspecs_nosc_ts_sa_ea
1265 | declspecs_sc_ts_nosa_noea
1266 | declspecs_sc_ts_nosa_ea
1267 | declspecs_sc_ts_sa_noea
1268 | declspecs_sc_ts_sa_ea
1269 ;
1271 declspecs_nots:
1272 declspecs_nosc_nots_nosa_noea
1273 | declspecs_nosc_nots_nosa_ea
1274 | declspecs_nosc_nots_sa_noea
1275 | declspecs_nosc_nots_sa_ea
1276 | declspecs_sc_nots_nosa_noea
1277 | declspecs_sc_nots_nosa_ea
1278 | declspecs_sc_nots_sa_noea
1279 | declspecs_sc_nots_sa_ea
1280 ;
1282 declspecs_ts_nosa:
1283 declspecs_nosc_ts_nosa_noea
1284 | declspecs_nosc_ts_nosa_ea
1285 | declspecs_sc_ts_nosa_noea
1286 | declspecs_sc_ts_nosa_ea
1287 ;
1289 declspecs_nots_nosa:
1290 declspecs_nosc_nots_nosa_noea
1291 | declspecs_nosc_nots_nosa_ea
1292 | declspecs_sc_nots_nosa_noea
1293 | declspecs_sc_nots_nosa_ea
1294 ;
1296 declspecs_nosc_ts:
1297 declspecs_nosc_ts_nosa_noea
1298 | declspecs_nosc_ts_nosa_ea
1299 | declspecs_nosc_ts_sa_noea
1300 | declspecs_nosc_ts_sa_ea
1301 ;
1303 declspecs_nosc_nots:
1304 declspecs_nosc_nots_nosa_noea
1305 | declspecs_nosc_nots_nosa_ea
1306 | declspecs_nosc_nots_sa_noea
1307 | declspecs_nosc_nots_sa_ea
1308 ;
1310 declspecs_nosc:
1311 declspecs_nosc_ts_nosa_noea
1312 | declspecs_nosc_ts_nosa_ea
1313 | declspecs_nosc_ts_sa_noea
1314 | declspecs_nosc_ts_sa_ea
1315 | declspecs_nosc_nots_nosa_noea
1316 | declspecs_nosc_nots_nosa_ea
1317 | declspecs_nosc_nots_sa_noea
1318 | declspecs_nosc_nots_sa_ea
1319 ;
1321 declspecs:
1322 declspecs_nosc_nots_nosa_noea
1323 | declspecs_nosc_nots_nosa_ea
1324 | declspecs_nosc_nots_sa_noea
1325 | declspecs_nosc_nots_sa_ea
1326 | declspecs_nosc_ts_nosa_noea
1327 | declspecs_nosc_ts_nosa_ea
1328 | declspecs_nosc_ts_sa_noea
1329 | declspecs_nosc_ts_sa_ea
1330 | declspecs_sc_nots_nosa_noea
1331 | declspecs_sc_nots_nosa_ea
1332 | declspecs_sc_nots_sa_noea
1333 | declspecs_sc_nots_sa_ea
1334 | declspecs_sc_ts_nosa_noea
1335 | declspecs_sc_ts_nosa_ea
1336 | declspecs_sc_ts_sa_noea
1337 | declspecs_sc_ts_sa_ea
1338 ;
1340 /* A (possibly empty) sequence of type qualifiers and attributes, to be
1341 followed by the effect of setattrs if any attributes were present. */
1342 maybe_type_quals_setattrs:
1343 /* empty */
1344 { $$ = NULL_TREE; }
1345 | declspecs_nosc_nots
1346 { tree specs, attrs;
1347 split_specs_attrs ($1, &specs, &attrs);
1348 /* ??? Yuck. See maybe_setattrs. */
1349 if (attrs != NULL_TREE)
1350 prefix_attributes = chainon (prefix_attributes, attrs);
1351 $$ = specs; }
1352 ;
1354 /* A type specifier (but not a type qualifier).
1355 Once we have seen one of these in a declaration,
1356 if a typedef name appears then it is being redeclared.
1358 The _reserved versions start with a reserved word and may appear anywhere
1359 in the declaration specifiers; the _nonreserved versions may only
1360 appear before any other type specifiers, and after that are (if names)
1361 being redeclared.
1363 FIXME: should the _nonreserved version be restricted to names being
1364 redeclared only? The other entries there relate only the GNU extensions
1365 and Objective C, and are historically parsed thus, and don't make sense
1366 after other type specifiers, but it might be cleaner to count them as
1367 _reserved.
1369 _attr means: specifiers that either end with attributes,
1370 or are such that any following attributes would
1371 be parsed as part of the specifier.
1373 _nonattr: specifiers. */
1375 typespec_nonattr:
1376 typespec_reserved_nonattr
1377 | typespec_nonreserved_nonattr
1378 ;
1380 typespec_attr:
1381 typespec_reserved_attr
1382 ;
1384 typespec_reserved_nonattr:
1385 TYPESPEC
1386 | structsp_nonattr
1387 ;
1389 typespec_reserved_attr:
1390 structsp_attr
1391 ;
1393 typespec_nonreserved_nonattr:
1394 TYPENAME
1395 { /* For a typedef name, record the meaning, not the name.
1396 In case of `foo foo, bar;'. */
1397 $$ = lookup_name ($1); }
1398 ifobjc
1399 | CLASSNAME protocolrefs
1400 { $$ = get_static_reference ($1, $2); }
1401 | OBJECTNAME protocolrefs
1402 { $$ = get_object_reference ($2); }
1404 /* Make "<SomeProtocol>" equivalent to "id <SomeProtocol>"
1405 - nisse@lysator.liu.se */
1406 | non_empty_protocolrefs
1407 { $$ = get_object_reference ($1); }
1408 end ifobjc
1409 | TYPEOF '(' expr ')'
1410 { $$ = TREE_TYPE ($3); }
1411 | TYPEOF '(' typename ')'
1412 { $$ = groktypename ($3); }
1413 ;
1415 /* typespec_nonreserved_attr does not exist. */
1417 initdecls:
1418 initdcl
1419 | initdecls ',' maybe_setattrs initdcl
1420 ;
1422 notype_initdecls:
1423 notype_initdcl
1424 | notype_initdecls ',' maybe_setattrs notype_initdcl
1425 ;
1427 maybeasm:
1428 /* empty */
1429 { $$ = NULL_TREE; }
1430 | ASM_KEYWORD '(' string ')'
1431 { if (TREE_CHAIN ($3)) $3 = combine_strings ($3);
1432 $$ = $3;
1433 }
1434 ;
1436 initdcl:
1437 declarator maybeasm maybe_attribute '='
1438 { $<ttype>$ = start_decl ($1, current_declspecs, 1,
1439 chainon ($3, prefix_attributes));
1440 start_init ($<ttype>$, $2, global_bindings_p ()); }
1441 init
1442 /* Note how the declaration of the variable is in effect while its init is parsed! */
1443 { finish_init ();
1444 finish_decl ($<ttype>5, $6, $2); }
1445 | declarator maybeasm maybe_attribute
1446 { tree d = start_decl ($1, current_declspecs, 0,
1447 chainon ($3, prefix_attributes));
1448 finish_decl (d, NULL_TREE, $2);
1449 }
1450 ;
1452 notype_initdcl:
1453 notype_declarator maybeasm maybe_attribute '='
1454 { $<ttype>$ = start_decl ($1, current_declspecs, 1,
1455 chainon ($3, prefix_attributes));
1456 start_init ($<ttype>$, $2, global_bindings_p ()); }
1457 init
1458 /* Note how the declaration of the variable is in effect while its init is parsed! */
1459 { finish_init ();
1460 finish_decl ($<ttype>5, $6, $2); }
1461 | notype_declarator maybeasm maybe_attribute
1462 { tree d = start_decl ($1, current_declspecs, 0,
1463 chainon ($3, prefix_attributes));
1464 finish_decl (d, NULL_TREE, $2); }
1465 ;
1466 /* the * rules are dummies to accept the Apollo extended syntax
1467 so that the header files compile. */
1468 maybe_attribute:
1469 /* empty */
1470 { $$ = NULL_TREE; }
1471 | attributes
1472 { $$ = $1; }
1473 ;
1475 attributes:
1476 attribute
1477 { $$ = $1; }
1478 | attributes attribute
1479 { $$ = chainon ($1, $2); }
1480 ;
1482 attribute:
1483 ATTRIBUTE '(' '(' attribute_list ')' ')'
1484 { $$ = $4; }
1485 ;
1487 attribute_list:
1488 attrib
1489 { $$ = $1; }
1490 | attribute_list ',' attrib
1491 { $$ = chainon ($1, $3); }
1492 ;
1494 attrib:
1495 /* empty */
1496 { $$ = NULL_TREE; }
1497 | any_word
1498 { $$ = build_tree_list ($1, NULL_TREE); }
1499 | any_word '(' IDENTIFIER ')'
1500 { $$ = build_tree_list ($1, build_tree_list (NULL_TREE, $3)); }
1501 | any_word '(' IDENTIFIER ',' nonnull_exprlist ')'
1502 { $$ = build_tree_list ($1, tree_cons (NULL_TREE, $3, $5)); }
1503 | any_word '(' exprlist ')'
1504 { $$ = build_tree_list ($1, $3); }
1505 ;
1507 /* This still leaves out most reserved keywords,
1508 shouldn't we include them? */
1510 any_word:
1511 identifier
1512 | SCSPEC
1513 | TYPESPEC
1514 | TYPE_QUAL
1515 ;
1516 \f
1517 /* Initializers. `init' is the entry point. */
1519 init:
1520 expr_no_commas
1521 | '{'
1522 { really_start_incremental_init (NULL_TREE); }
1523 initlist_maybe_comma '}'
1524 { $$ = pop_init_level (0); }
1525 | error
1526 { $$ = error_mark_node; }
1527 ;
1529 /* `initlist_maybe_comma' is the guts of an initializer in braces. */
1530 initlist_maybe_comma:
1531 /* empty */
1532 { if (pedantic)
1533 pedwarn ("ISO C forbids empty initializer braces"); }
1534 | initlist1 maybecomma
1535 ;
1537 initlist1:
1538 initelt
1539 | initlist1 ',' initelt
1540 ;
1542 /* `initelt' is a single element of an initializer.
1543 It may use braces. */
1544 initelt:
1545 designator_list '=' initval
1546 { if (pedantic && ! flag_isoc99)
1547 pedwarn ("ISO C89 forbids specifying subobject to initialize"); }
1548 | designator initval
1549 { if (pedantic)
1550 pedwarn ("obsolete use of designated initializer without `='"); }
1551 | identifier ':'
1552 { set_init_label ($1);
1553 if (pedantic)
1554 pedwarn ("obsolete use of designated initializer with `:'"); }
1555 initval
1556 | initval
1557 ;
1559 initval:
1560 '{'
1561 { push_init_level (0); }
1562 initlist_maybe_comma '}'
1563 { process_init_element (pop_init_level (0)); }
1564 | expr_no_commas
1565 { process_init_element ($1); }
1566 | error
1567 ;
1569 designator_list:
1570 designator
1571 | designator_list designator
1572 ;
1574 designator:
1575 '.' identifier
1576 { set_init_label ($2); }
1577 /* These are for labeled elements. The syntax for an array element
1578 initializer conflicts with the syntax for an Objective-C message,
1579 so don't include these productions in the Objective-C grammar. */
1580 ifc
1581 | '[' expr_no_commas ELLIPSIS expr_no_commas ']'
1582 { set_init_index ($2, $4);
1583 if (pedantic)
1584 pedwarn ("ISO C forbids specifying range of elements to initialize"); }
1585 | '[' expr_no_commas ']'
1586 { set_init_index ($2, NULL_TREE); }
1587 end ifc
1588 ;
1589 \f
1590 nested_function:
1591 declarator
1592 { if (pedantic)
1593 pedwarn ("ISO C forbids nested functions");
1595 push_function_context ();
1596 if (! start_function (current_declspecs, $1,
1597 prefix_attributes))
1598 {
1599 pop_function_context ();
1600 YYERROR1;
1601 }
1602 }
1603 old_style_parm_decls
1604 { store_parm_decls (); }
1605 /* This used to use compstmt_or_error.
1606 That caused a bug with input `f(g) int g {}',
1607 where the use of YYERROR1 above caused an error
1608 which then was handled by compstmt_or_error.
1609 There followed a repeated execution of that same rule,
1610 which called YYERROR1 again, and so on. */
1611 save_filename save_lineno compstmt
1612 { tree decl = current_function_decl;
1613 DECL_SOURCE_FILE (decl) = $5;
1614 DECL_SOURCE_LINE (decl) = $6;
1615 finish_function (1);
1616 pop_function_context ();
1617 add_decl_stmt (decl); }
1618 ;
1620 notype_nested_function:
1621 notype_declarator
1622 { if (pedantic)
1623 pedwarn ("ISO C forbids nested functions");
1625 push_function_context ();
1626 if (! start_function (current_declspecs, $1,
1627 prefix_attributes))
1628 {
1629 pop_function_context ();
1630 YYERROR1;
1631 }
1632 }
1633 old_style_parm_decls
1634 { store_parm_decls (); }
1635 /* This used to use compstmt_or_error.
1636 That caused a bug with input `f(g) int g {}',
1637 where the use of YYERROR1 above caused an error
1638 which then was handled by compstmt_or_error.
1639 There followed a repeated execution of that same rule,
1640 which called YYERROR1 again, and so on. */
1641 save_filename save_lineno compstmt
1642 { tree decl = current_function_decl;
1643 DECL_SOURCE_FILE (decl) = $5;
1644 DECL_SOURCE_LINE (decl) = $6;
1645 finish_function (1);
1646 pop_function_context ();
1647 add_decl_stmt (decl); }
1648 ;
1650 /* Any kind of declarator (thus, all declarators allowed
1651 after an explicit typespec). */
1653 declarator:
1654 after_type_declarator
1655 | notype_declarator
1656 ;
1658 /* A declarator that is allowed only after an explicit typespec. */
1660 after_type_declarator:
1661 '(' maybe_setattrs after_type_declarator ')'
1662 { $$ = $3; }
1663 | after_type_declarator '(' parmlist_or_identifiers %prec '.'
1664 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1665 /* | after_type_declarator '(' error ')' %prec '.'
1666 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1667 poplevel (0, 0, 0); } */
1668 | after_type_declarator array_declarator %prec '.'
1669 { $$ = set_array_declarator_type ($2, $1, 0); }
1670 | '*' maybe_type_quals_setattrs after_type_declarator %prec UNARY
1671 { $$ = make_pointer_declarator ($2, $3); }
1672 | TYPENAME
1673 ifobjc
1674 | OBJECTNAME
1675 end ifobjc
1676 ;
1678 /* Kinds of declarator that can appear in a parameter list
1679 in addition to notype_declarator. This is like after_type_declarator
1680 but does not allow a typedef name in parentheses as an identifier
1681 (because it would conflict with a function with that typedef as arg). */
1682 parm_declarator:
1683 parm_declarator_starttypename
1684 | parm_declarator_nostarttypename
1685 ;
1687 parm_declarator_starttypename:
1688 parm_declarator_starttypename '(' parmlist_or_identifiers %prec '.'
1689 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1690 /* | parm_declarator_starttypename '(' error ')' %prec '.'
1691 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1692 poplevel (0, 0, 0); } */
1693 | parm_declarator_starttypename array_declarator %prec '.'
1694 { $$ = set_array_declarator_type ($2, $1, 0); }
1695 | TYPENAME
1696 ;
1698 parm_declarator_nostarttypename:
1699 parm_declarator_nostarttypename '(' parmlist_or_identifiers %prec '.'
1700 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1701 /* | parm_declarator_nostarttypename '(' error ')' %prec '.'
1702 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1703 poplevel (0, 0, 0); } */
1704 | parm_declarator_nostarttypename array_declarator %prec '.'
1705 { $$ = set_array_declarator_type ($2, $1, 0); }
1706 | '*' maybe_type_quals_setattrs parm_declarator_starttypename %prec UNARY
1707 { $$ = make_pointer_declarator ($2, $3); }
1708 | '*' maybe_type_quals_setattrs parm_declarator_nostarttypename %prec UNARY
1709 { $$ = make_pointer_declarator ($2, $3); }
1710 | '(' maybe_setattrs parm_declarator_nostarttypename ')'
1711 { $$ = $3; }
1712 ;
1714 /* A declarator allowed whether or not there has been
1715 an explicit typespec. These cannot redeclare a typedef-name. */
1717 notype_declarator:
1718 notype_declarator '(' parmlist_or_identifiers %prec '.'
1719 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1720 /* | notype_declarator '(' error ')' %prec '.'
1721 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1722 poplevel (0, 0, 0); } */
1723 | '(' maybe_setattrs notype_declarator ')'
1724 { $$ = $3; }
1725 | '*' maybe_type_quals_setattrs notype_declarator %prec UNARY
1726 { $$ = make_pointer_declarator ($2, $3); }
1727 | notype_declarator array_declarator %prec '.'
1728 { $$ = set_array_declarator_type ($2, $1, 0); }
1729 | IDENTIFIER
1730 ;
1732 struct_head:
1733 STRUCT
1734 { $$ = NULL_TREE; }
1735 | STRUCT attributes
1736 { $$ = $2; }
1737 ;
1739 union_head:
1740 UNION
1741 { $$ = NULL_TREE; }
1742 | UNION attributes
1743 { $$ = $2; }
1744 ;
1746 enum_head:
1747 ENUM
1748 { $$ = NULL_TREE; }
1749 | ENUM attributes
1750 { $$ = $2; }
1751 ;
1753 /* structsp_attr: struct/union/enum specifiers that either
1754 end with attributes, or are such that any following attributes would
1755 be parsed as part of the struct/union/enum specifier.
1757 structsp_nonattr: other struct/union/enum specifiers. */
1759 structsp_attr:
1760 struct_head identifier '{'
1761 { $$ = start_struct (RECORD_TYPE, $2);
1762 /* Start scope of tag before parsing components. */
1763 }
1764 component_decl_list '}' maybe_attribute
1765 { $$ = finish_struct ($<ttype>4, $5, chainon ($1, $7)); }
1766 | struct_head '{' component_decl_list '}' maybe_attribute
1767 { $$ = finish_struct (start_struct (RECORD_TYPE, NULL_TREE),
1768 $3, chainon ($1, $5));
1769 }
1770 | union_head identifier '{'
1771 { $$ = start_struct (UNION_TYPE, $2); }
1772 component_decl_list '}' maybe_attribute
1773 { $$ = finish_struct ($<ttype>4, $5, chainon ($1, $7)); }
1774 | union_head '{' component_decl_list '}' maybe_attribute
1775 { $$ = finish_struct (start_struct (UNION_TYPE, NULL_TREE),
1776 $3, chainon ($1, $5));
1777 }
1778 | enum_head identifier '{'
1779 { $$ = start_enum ($2); }
1780 enumlist maybecomma_warn '}' maybe_attribute
1781 { $$ = finish_enum ($<ttype>4, nreverse ($5),
1782 chainon ($1, $8)); }
1783 | enum_head '{'
1784 { $$ = start_enum (NULL_TREE); }
1785 enumlist maybecomma_warn '}' maybe_attribute
1786 { $$ = finish_enum ($<ttype>3, nreverse ($4),
1787 chainon ($1, $7)); }
1788 ;
1790 structsp_nonattr:
1791 struct_head identifier
1792 { $$ = xref_tag (RECORD_TYPE, $2); }
1793 | union_head identifier
1794 { $$ = xref_tag (UNION_TYPE, $2); }
1795 | enum_head identifier
1796 { $$ = xref_tag (ENUMERAL_TYPE, $2);
1797 /* In ISO C, enumerated types can be referred to
1798 only if already defined. */
1799 if (pedantic && !COMPLETE_TYPE_P ($$))
1800 pedwarn ("ISO C forbids forward references to `enum' types"); }
1801 ;
1803 maybecomma:
1804 /* empty */
1805 | ','
1806 ;
1808 maybecomma_warn:
1809 /* empty */
1810 | ','
1811 { if (pedantic && ! flag_isoc99)
1812 pedwarn ("comma at end of enumerator list"); }
1813 ;
1815 component_decl_list:
1816 component_decl_list2
1817 { $$ = $1; }
1818 | component_decl_list2 component_decl
1819 { $$ = chainon ($1, $2);
1820 pedwarn ("no semicolon at end of struct or union"); }
1821 ;
1823 component_decl_list2: /* empty */
1824 { $$ = NULL_TREE; }
1825 | component_decl_list2 component_decl ';'
1826 { $$ = chainon ($1, $2); }
1827 | component_decl_list2 ';'
1828 { if (pedantic)
1829 pedwarn ("extra semicolon in struct or union specified"); }
1830 ifobjc
1831 /* foo(sizeof(struct{ @defs(ClassName)})); */
1832 | DEFS '(' CLASSNAME ')'
1833 {
1834 tree interface = lookup_interface ($3);
1836 if (interface)
1837 $$ = get_class_ivars (interface);
1838 else
1839 {
1840 error ("Cannot find interface declaration for `%s'",
1841 IDENTIFIER_POINTER ($3));
1842 $$ = NULL_TREE;
1843 }
1844 }
1845 end ifobjc
1846 ;
1848 component_decl:
1849 declspecs_nosc_ts setspecs components
1850 { $$ = $3;
1851 current_declspecs = TREE_VALUE (declspec_stack);
1852 prefix_attributes = TREE_PURPOSE (declspec_stack);
1853 declspec_stack = TREE_CHAIN (declspec_stack); }
1854 | declspecs_nosc_ts setspecs save_filename save_lineno
1855 {
1856 /* Support for unnamed structs or unions as members of
1857 structs or unions (which is [a] useful and [b] supports
1858 MS P-SDK). */
1859 if (pedantic)
1860 pedwarn ("ISO C doesn't support unnamed structs/unions");
1862 $$ = grokfield($3, $4, NULL, current_declspecs, NULL_TREE);
1863 current_declspecs = TREE_VALUE (declspec_stack);
1864 prefix_attributes = TREE_PURPOSE (declspec_stack);
1865 declspec_stack = TREE_CHAIN (declspec_stack);
1866 }
1867 | declspecs_nosc_nots setspecs components_notype
1868 { $$ = $3;
1869 current_declspecs = TREE_VALUE (declspec_stack);
1870 prefix_attributes = TREE_PURPOSE (declspec_stack);
1871 declspec_stack = TREE_CHAIN (declspec_stack); }
1872 | declspecs_nosc_nots
1873 { if (pedantic)
1874 pedwarn ("ISO C forbids member declarations with no members");
1875 shadow_tag($1);
1876 $$ = NULL_TREE; }
1877 | error
1878 { $$ = NULL_TREE; }
1879 | extension component_decl
1880 { $$ = $2;
1881 RESTORE_WARN_FLAGS ($1); }
1882 ;
1884 components:
1885 component_declarator
1886 | components ',' maybe_setattrs component_declarator
1887 { $$ = chainon ($1, $4); }
1888 ;
1890 components_notype:
1891 component_notype_declarator
1892 | components_notype ',' maybe_setattrs component_notype_declarator
1893 { $$ = chainon ($1, $4); }
1894 ;
1896 component_declarator:
1897 save_filename save_lineno declarator maybe_attribute
1898 { $$ = grokfield ($1, $2, $3, current_declspecs, NULL_TREE);
1899 decl_attributes ($$, chainon ($4, prefix_attributes)); }
1900 | save_filename save_lineno
1901 declarator ':' expr_no_commas maybe_attribute
1902 { $$ = grokfield ($1, $2, $3, current_declspecs, $5);
1903 decl_attributes ($$, chainon ($6, prefix_attributes)); }
1904 | save_filename save_lineno ':' expr_no_commas maybe_attribute
1905 { $$ = grokfield ($1, $2, NULL_TREE, current_declspecs, $4);
1906 decl_attributes ($$, chainon ($5, prefix_attributes)); }
1907 ;
1909 component_notype_declarator:
1910 save_filename save_lineno notype_declarator maybe_attribute
1911 { $$ = grokfield ($1, $2, $3, current_declspecs, NULL_TREE);
1912 decl_attributes ($$, chainon ($4, prefix_attributes)); }
1913 | save_filename save_lineno
1914 notype_declarator ':' expr_no_commas maybe_attribute
1915 { $$ = grokfield ($1, $2, $3, current_declspecs, $5);
1916 decl_attributes ($$, chainon ($6, prefix_attributes)); }
1917 | save_filename save_lineno ':' expr_no_commas maybe_attribute
1918 { $$ = grokfield ($1, $2, NULL_TREE, current_declspecs, $4);
1919 decl_attributes ($$, chainon ($5, prefix_attributes)); }
1920 ;
1922 /* We chain the enumerators in reverse order.
1923 They are put in forward order where enumlist is used.
1924 (The order used to be significant, but no longer is so.
1925 However, we still maintain the order, just to be clean.) */
1927 enumlist:
1928 enumerator
1929 | enumlist ',' enumerator
1930 { if ($1 == error_mark_node)
1931 $$ = $1;
1932 else
1933 $$ = chainon ($3, $1); }
1934 | error
1935 { $$ = error_mark_node; }
1936 ;
1939 enumerator:
1940 identifier
1941 { $$ = build_enumerator ($1, NULL_TREE); }
1942 | identifier '=' expr_no_commas
1943 { $$ = build_enumerator ($1, $3); }
1944 ;
1946 typename:
1947 declspecs_nosc
1948 { tree specs, attrs;
1949 pending_xref_error ();
1950 split_specs_attrs ($1, &specs, &attrs);
1951 /* We don't yet support attributes here. */
1952 if (attrs != NULL_TREE)
1953 warning ("attributes on type name ignored");
1954 $<ttype>$ = specs; }
1955 absdcl
1956 { $$ = build_tree_list ($<ttype>2, $3); }
1957 ;
1959 absdcl: /* an absolute declarator */
1960 /* empty */
1961 { $$ = NULL_TREE; }
1962 | absdcl1
1963 ;
1965 absdcl_maybe_attribute: /* absdcl maybe_attribute, but not just attributes */
1966 /* empty */
1967 { $$ = build_tree_list (build_tree_list (current_declspecs,
1968 NULL_TREE),
1969 prefix_attributes); }
1970 | absdcl1
1971 { $$ = build_tree_list (build_tree_list (current_declspecs,
1972 $1),
1973 prefix_attributes); }
1974 | absdcl1_noea attributes
1975 { $$ = build_tree_list (build_tree_list (current_declspecs,
1976 $1),
1977 chainon ($2, prefix_attributes)); }
1978 ;
1980 absdcl1: /* a nonempty absolute declarator */
1981 absdcl1_ea
1982 | absdcl1_noea
1983 ;
1985 absdcl1_noea:
1986 direct_absdcl1
1987 | '*' maybe_type_quals_setattrs absdcl1_noea
1988 { $$ = make_pointer_declarator ($2, $3); }
1989 ;
1991 absdcl1_ea:
1992 '*' maybe_type_quals_setattrs
1993 { $$ = make_pointer_declarator ($2, NULL_TREE); }
1994 | '*' maybe_type_quals_setattrs absdcl1_ea
1995 { $$ = make_pointer_declarator ($2, $3); }
1996 ;
1998 direct_absdcl1:
1999 '(' maybe_setattrs absdcl1 ')'
2000 { $$ = $3; }
2001 | direct_absdcl1 '(' parmlist
2002 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
2003 | direct_absdcl1 array_declarator
2004 { $$ = set_array_declarator_type ($2, $1, 1); }
2005 | '(' parmlist
2006 { $$ = build_nt (CALL_EXPR, NULL_TREE, $2, NULL_TREE); }
2007 | array_declarator
2008 { $$ = set_array_declarator_type ($1, NULL_TREE, 1); }
2009 ;
2011 /* The [...] part of a declarator for an array type. */
2013 array_declarator:
2014 '[' expr ']'
2015 { $$ = build_array_declarator ($2, NULL_TREE, 0, 0); }
2016 | '[' declspecs_nosc expr ']'
2017 { $$ = build_array_declarator ($3, $2, 0, 0); }
2018 | '[' ']'
2019 { $$ = build_array_declarator (NULL_TREE, NULL_TREE, 0, 0); }
2020 | '[' declspecs_nosc ']'
2021 { $$ = build_array_declarator (NULL_TREE, $2, 0, 0); }
2022 | '[' '*' ']'
2023 { $$ = build_array_declarator (NULL_TREE, NULL_TREE, 0, 1); }
2024 | '[' declspecs_nosc '*' ']'
2025 { $$ = build_array_declarator (NULL_TREE, $2, 0, 1); }
2026 | '[' SCSPEC expr ']'
2027 { if (C_RID_CODE ($2) != RID_STATIC)
2028 error ("storage class specifier in array declarator");
2029 $$ = build_array_declarator ($3, NULL_TREE, 1, 0); }
2030 | '[' SCSPEC declspecs_nosc expr ']'
2031 { if (C_RID_CODE ($2) != RID_STATIC)
2032 error ("storage class specifier in array declarator");
2033 $$ = build_array_declarator ($4, $3, 1, 0); }
2034 | '[' declspecs_nosc SCSPEC expr ']'
2035 { if (C_RID_CODE ($3) != RID_STATIC)
2036 error ("storage class specifier in array declarator");
2037 $$ = build_array_declarator ($4, $2, 1, 0); }
2038 ;
2040 /* A nonempty series of declarations and statements (possibly followed by
2041 some labels) that can form the body of a compound statement.
2042 NOTE: we don't allow labels on declarations; this might seem like a
2043 natural extension, but there would be a conflict between attributes
2044 on the label and prefix attributes on the declaration. */
2046 stmts_and_decls:
2047 lineno_stmt_decl_or_labels_ending_stmt
2048 | lineno_stmt_decl_or_labels_ending_decl
2049 | lineno_stmt_decl_or_labels_ending_label
2050 {
2051 pedwarn ("deprecated use of label at end of compound statement");
2052 }
2053 | lineno_stmt_decl_or_labels_ending_error
2054 ;
2056 lineno_stmt_decl_or_labels_ending_stmt:
2057 lineno_stmt
2058 | lineno_stmt_decl_or_labels_ending_stmt lineno_stmt
2059 | lineno_stmt_decl_or_labels_ending_decl lineno_stmt
2060 | lineno_stmt_decl_or_labels_ending_label lineno_stmt
2061 | lineno_stmt_decl_or_labels_ending_error lineno_stmt
2062 ;
2064 lineno_stmt_decl_or_labels_ending_decl:
2065 lineno_decl
2066 | lineno_stmt_decl_or_labels_ending_stmt lineno_decl
2067 { if (pedantic && !flag_isoc99)
2068 pedwarn ("ISO C89 forbids mixed declarations and code"); }
2069 | lineno_stmt_decl_or_labels_ending_decl lineno_decl
2070 | lineno_stmt_decl_or_labels_ending_error lineno_decl
2071 ;
2073 lineno_stmt_decl_or_labels_ending_label:
2074 lineno_label
2075 | lineno_stmt_decl_or_labels_ending_stmt lineno_label
2076 | lineno_stmt_decl_or_labels_ending_decl lineno_label
2077 | lineno_stmt_decl_or_labels_ending_label lineno_label
2078 | lineno_stmt_decl_or_labels_ending_error lineno_label
2079 ;
2081 lineno_stmt_decl_or_labels_ending_error:
2082 errstmt
2083 | lineno_stmt_decl_or_labels errstmt
2084 ;
2086 lineno_stmt_decl_or_labels:
2087 lineno_stmt_decl_or_labels_ending_stmt
2088 | lineno_stmt_decl_or_labels_ending_decl
2089 | lineno_stmt_decl_or_labels_ending_label
2090 | lineno_stmt_decl_or_labels_ending_error
2091 ;
2093 errstmt: error ';'
2094 ;
2096 pushlevel: /* empty */
2097 { pushlevel (0);
2098 clear_last_expr ();
2099 add_scope_stmt (/*begin_p=*/1, /*partial_p=*/0);
2100 ifobjc
2101 if (objc_method_context)
2102 add_objc_decls ();
2103 end ifobjc
2104 }
2105 ;
2107 poplevel: /* empty */
2108 { $$ = add_scope_stmt (/*begin_p=*/0, /*partial_p=*/0); }
2110 /* Start and end blocks created for the new scopes of C99. */
2111 c99_block_start: /* empty */
2112 { if (flag_isoc99)
2113 {
2114 $$ = c_begin_compound_stmt ();
2115 pushlevel (0);
2116 clear_last_expr ();
2117 add_scope_stmt (/*begin_p=*/1, /*partial_p=*/0);
2118 ifobjc
2119 if (objc_method_context)
2120 add_objc_decls ();
2121 end ifobjc
2122 }
2123 else
2124 $$ = NULL_TREE;
2125 }
2126 ;
2128 /* Productions using c99_block_start and c99_block_end will need to do what's
2129 in compstmt: RECHAIN_STMTS ($1, COMPOUND_BODY ($1)); $$ = $2; where
2130 $1 is the value of c99_block_start and $2 of c99_block_end. */
2131 c99_block_end: /* empty */
2132 { if (flag_isoc99)
2133 {
2134 tree scope_stmt = add_scope_stmt (/*begin_p=*/0, /*partial_p=*/0);
2135 $$ = poplevel (kept_level_p (), 0, 0);
2136 SCOPE_STMT_BLOCK (TREE_PURPOSE (scope_stmt))
2137 = SCOPE_STMT_BLOCK (TREE_VALUE (scope_stmt))
2138 = $$;
2139 }
2140 else
2141 $$ = NULL_TREE; }
2142 ;
2144 /* Read zero or more forward-declarations for labels
2145 that nested functions can jump to. */
2146 maybe_label_decls:
2147 /* empty */
2148 | label_decls
2149 { if (pedantic)
2150 pedwarn ("ISO C forbids label declarations"); }
2151 ;
2153 label_decls:
2154 label_decl
2155 | label_decls label_decl
2156 ;
2158 label_decl:
2159 LABEL identifiers_or_typenames ';'
2160 { tree link;
2161 for (link = $2; link; link = TREE_CHAIN (link))
2162 {
2163 tree label = shadow_label (TREE_VALUE (link));
2164 C_DECLARED_LABEL_FLAG (label) = 1;
2165 add_decl_stmt (label);
2166 }
2167 }
2168 ;
2170 /* This is the body of a function definition.
2171 It causes syntax errors to ignore to the next openbrace. */
2172 compstmt_or_error:
2173 compstmt
2174 {}
2175 | error compstmt
2176 ;
2178 compstmt_start: '{' { compstmt_count++;
2179 $$ = c_begin_compound_stmt (); }
2181 compstmt_nostart: '}'
2182 { $$ = convert (void_type_node, integer_zero_node); }
2183 | pushlevel maybe_label_decls compstmt_contents_nonempty '}' poplevel
2184 { $$ = poplevel (kept_level_p (), 1, 0);
2185 SCOPE_STMT_BLOCK (TREE_PURPOSE ($5))
2186 = SCOPE_STMT_BLOCK (TREE_VALUE ($5))
2187 = $$; }
2188 ;
2190 compstmt_contents_nonempty:
2191 stmts_and_decls
2192 | error
2193 ;
2195 compstmt_primary_start:
2196 '(' '{'
2197 { if (current_function_decl == 0)
2198 {
2199 error ("braced-group within expression allowed only inside a function");
2200 YYERROR;
2201 }
2202 /* We must force a BLOCK for this level
2203 so that, if it is not expanded later,
2204 there is a way to turn off the entire subtree of blocks
2205 that are contained in it. */
2206 keep_next_level ();
2207 push_label_level ();
2208 compstmt_count++;
2209 $$ = add_stmt (build_stmt (COMPOUND_STMT, last_tree));
2210 }
2212 compstmt: compstmt_start compstmt_nostart
2213 { RECHAIN_STMTS ($1, COMPOUND_BODY ($1));
2214 $$ = $1; }
2215 ;
2217 /* Value is number of statements counted as of the closeparen. */
2218 simple_if:
2219 if_prefix c99_block_lineno_labeled_stmt
2220 { c_finish_then (); }
2221 /* Make sure c_expand_end_cond is run once
2222 for each call to c_expand_start_cond.
2223 Otherwise a crash is likely. */
2224 | if_prefix error
2225 ;
2227 if_prefix:
2228 IF '(' expr ')'
2229 { c_expand_start_cond (truthvalue_conversion ($3),
2230 compstmt_count);
2231 $<itype>$ = stmt_count;
2232 if_stmt_file = $<filename>-2;
2233 if_stmt_line = $<lineno>-1; }
2234 ;
2236 /* This is a subroutine of stmt.
2237 It is used twice, once for valid DO statements
2238 and once for catching errors in parsing the end test. */
2239 do_stmt_start:
2240 DO
2241 { stmt_count++;
2242 compstmt_count++;
2243 $<ttype>$
2244 = add_stmt (build_stmt (DO_STMT, NULL_TREE,
2245 NULL_TREE));
2246 /* In the event that a parse error prevents
2247 parsing the complete do-statement, set the
2248 condition now. Otherwise, we can get crashes at
2249 RTL-generation time. */
2250 DO_COND ($<ttype>$) = error_mark_node; }
2251 c99_block_lineno_labeled_stmt WHILE
2252 { $$ = $<ttype>2;
2253 RECHAIN_STMTS ($$, DO_BODY ($$)); }
2254 ;
2256 /* The forced readahead in here is because we might be at the end of a
2257 line, and the line and file won't be bumped until yylex absorbs the
2258 first token on the next line. */
2259 save_filename:
2260 { if (yychar == YYEMPTY)
2261 yychar = YYLEX;
2262 $$ = input_filename; }
2263 ;
2265 save_lineno:
2266 { if (yychar == YYEMPTY)
2267 yychar = YYLEX;
2268 $$ = lineno; }
2269 ;
2271 lineno_labeled_stmt:
2272 lineno_stmt
2273 | lineno_label lineno_labeled_stmt
2274 ;
2276 /* Like lineno_labeled_stmt, but a block in C99. */
2277 c99_block_lineno_labeled_stmt:
2278 c99_block_start lineno_labeled_stmt c99_block_end
2279 { if (flag_isoc99)
2280 RECHAIN_STMTS ($1, COMPOUND_BODY ($1)); }
2281 ;
2283 lineno_stmt:
2284 save_filename save_lineno stmt
2285 { if ($3)
2286 {
2287 STMT_LINENO ($3) = $2;
2288 /* ??? We currently have no way of recording
2289 the filename for a statement. This probably
2290 matters little in practice at the moment,
2291 but I suspect that problems will ocurr when
2292 doing inlining at the tree level. */
2293 }
2294 }
2295 ;
2297 lineno_label:
2298 save_filename save_lineno label
2299 { if ($3)
2300 {
2301 STMT_LINENO ($3) = $2;
2302 }
2303 }
2304 ;
2306 select_or_iter_stmt:
2307 simple_if ELSE
2308 { c_expand_start_else ();
2309 $<itype>1 = stmt_count; }
2310 c99_block_lineno_labeled_stmt
2311 { c_finish_else ();
2312 c_expand_end_cond ();
2313 if (extra_warnings && stmt_count == $<itype>1)
2314 warning ("empty body in an else-statement"); }
2315 | simple_if %prec IF
2316 { c_expand_end_cond ();
2317 /* This warning is here instead of in simple_if, because we
2318 do not want a warning if an empty if is followed by an
2319 else statement. Increment stmt_count so we don't
2320 give a second error if this is a nested `if'. */
2321 if (extra_warnings && stmt_count++ == $<itype>1)
2322 warning_with_file_and_line (if_stmt_file, if_stmt_line,
2323 "empty body in an if-statement"); }
2324 /* Make sure c_expand_end_cond is run once
2325 for each call to c_expand_start_cond.
2326 Otherwise a crash is likely. */
2327 | simple_if ELSE error
2328 { c_expand_end_cond (); }
2329 | WHILE
2330 { stmt_count++; }
2331 '(' expr ')'
2332 { $4 = truthvalue_conversion ($4);
2333 $<ttype>$
2334 = add_stmt (build_stmt (WHILE_STMT, $4, NULL_TREE)); }
2335 c99_block_lineno_labeled_stmt
2336 { RECHAIN_STMTS ($<ttype>6, WHILE_BODY ($<ttype>6)); }
2337 | do_stmt_start
2338 '(' expr ')' ';'
2339 { DO_COND ($1) = truthvalue_conversion ($3); }
2340 | do_stmt_start error
2341 { }
2342 | FOR
2343 { $<ttype>$ = build_stmt (FOR_STMT, NULL_TREE, NULL_TREE,
2344 NULL_TREE, NULL_TREE);
2345 add_stmt ($<ttype>$); }
2346 '(' for_init_stmt
2347 { stmt_count++;
2348 RECHAIN_STMTS ($<ttype>2, FOR_INIT_STMT ($<ttype>2)); }
2349 xexpr ';'
2350 { if ($6)
2351 FOR_COND ($<ttype>2) = truthvalue_conversion ($6); }
2352 xexpr ')'
2353 { FOR_EXPR ($<ttype>2) = $9; }
2354 c99_block_lineno_labeled_stmt
2355 { RECHAIN_STMTS ($<ttype>2, FOR_BODY ($<ttype>2)); }
2356 | SWITCH '(' expr ')'
2357 { stmt_count++;
2358 $<ttype>$ = c_start_case ($3); }
2359 c99_block_lineno_labeled_stmt
2360 { c_finish_case (); }
2361 ;
2363 for_init_stmt:
2364 xexpr ';'
2365 { add_stmt (build_stmt (EXPR_STMT, $1)); }
2366 | decl
2367 { check_for_loop_decls (); }
2368 ;
2370 /* Parse a single real statement, not including any labels. */
2371 stmt:
2372 compstmt
2373 { stmt_count++; $$ = $1; }
2374 | expr ';'
2375 { stmt_count++;
2376 $$ = c_expand_expr_stmt ($1); }
2377 | c99_block_start select_or_iter_stmt c99_block_end
2378 { if (flag_isoc99)
2379 RECHAIN_STMTS ($1, COMPOUND_BODY ($1));
2380 $$ = NULL_TREE; }
2381 | BREAK ';'
2382 { stmt_count++;
2383 $$ = add_stmt (build_break_stmt ()); }
2384 | CONTINUE ';'
2385 { stmt_count++;
2386 $$ = add_stmt (build_continue_stmt ()); }
2387 | RETURN ';'
2388 { stmt_count++;
2389 $$ = c_expand_return (NULL_TREE); }
2390 | RETURN expr ';'
2391 { stmt_count++;
2392 $$ = c_expand_return ($2); }
2393 | ASM_KEYWORD maybe_type_qual '(' expr ')' ';'
2394 { stmt_count++;
2395 $$ = simple_asm_stmt ($4); }
2396 /* This is the case with just output operands. */
2397 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ')' ';'
2398 { stmt_count++;
2399 $$ = build_asm_stmt ($2, $4, $6, NULL_TREE, NULL_TREE); }
2400 /* This is the case with input operands as well. */
2401 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':'
2402 asm_operands ')' ';'
2403 { stmt_count++;
2404 $$ = build_asm_stmt ($2, $4, $6, $8, NULL_TREE); }
2405 /* This is the case with clobbered registers as well. */
2406 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':'
2407 asm_operands ':' asm_clobbers ')' ';'
2408 { stmt_count++;
2409 $$ = build_asm_stmt ($2, $4, $6, $8, $10); }
2410 | GOTO identifier ';'
2411 { tree decl;
2412 stmt_count++;
2413 decl = lookup_label ($2);
2414 if (decl != 0)
2415 {
2416 TREE_USED (decl) = 1;
2417 $$ = add_stmt (build_stmt (GOTO_STMT, decl));
2418 }
2419 else
2420 $$ = NULL_TREE;
2421 }
2422 | GOTO '*' expr ';'
2423 { if (pedantic)
2424 pedwarn ("ISO C forbids `goto *expr;'");
2425 stmt_count++;
2426 $3 = convert (ptr_type_node, $3);
2427 $$ = add_stmt (build_stmt (GOTO_STMT, $3)); }
2428 | ';'
2429 { $$ = NULL_TREE; }
2430 ;
2432 /* Any kind of label, including jump labels and case labels.
2433 ANSI C accepts labels only before statements, but we allow them
2434 also at the end of a compound statement. */
2436 label: CASE expr_no_commas ':'
2437 { stmt_count++;
2438 $$ = do_case ($2, NULL_TREE); }
2439 | CASE expr_no_commas ELLIPSIS expr_no_commas ':'
2440 { stmt_count++;
2441 $$ = do_case ($2, $4); }
2442 | DEFAULT ':'
2443 { stmt_count++;
2444 $$ = do_case (NULL_TREE, NULL_TREE); }
2445 | identifier save_filename save_lineno ':' maybe_attribute
2446 { tree label = define_label ($2, $3, $1);
2447 stmt_count++;
2448 if (label)
2449 {
2450 decl_attributes (label, $5);
2451 $$ = add_stmt (build_stmt (LABEL_STMT, label));
2452 }
2453 else
2454 $$ = NULL_TREE;
2455 }
2456 ;
2458 /* Either a type-qualifier or nothing. First thing in an `asm' statement. */
2460 maybe_type_qual:
2461 /* empty */
2462 { emit_line_note (input_filename, lineno);
2463 $$ = NULL_TREE; }
2464 | TYPE_QUAL
2465 { emit_line_note (input_filename, lineno); }
2466 ;
2468 xexpr:
2469 /* empty */
2470 { $$ = NULL_TREE; }
2471 | expr
2472 ;
2474 /* These are the operands other than the first string and colon
2475 in asm ("addextend %2,%1": "=dm" (x), "0" (y), "g" (*x)) */
2476 asm_operands: /* empty */
2477 { $$ = NULL_TREE; }
2478 | nonnull_asm_operands
2479 ;
2481 nonnull_asm_operands:
2482 asm_operand
2483 | nonnull_asm_operands ',' asm_operand
2484 { $$ = chainon ($1, $3); }
2485 ;
2487 asm_operand:
2488 STRING '(' expr ')'
2489 { $$ = build_tree_list ($1, $3); }
2490 ;
2492 asm_clobbers:
2493 string
2494 { $$ = tree_cons (NULL_TREE, combine_strings ($1), NULL_TREE); }
2495 | asm_clobbers ',' string
2496 { $$ = tree_cons (NULL_TREE, combine_strings ($3), $1); }
2497 ;
2498 \f
2499 /* This is what appears inside the parens in a function declarator.
2500 Its value is a list of ..._TYPE nodes. Attributes must appear here
2501 to avoid a conflict with their appearance after an open parenthesis
2502 in an abstract declarator, as in
2503 "void bar (int (__attribute__((__mode__(SI))) int foo));". */
2504 parmlist:
2505 maybe_attribute
2506 { pushlevel (0);
2507 clear_parm_order ();
2508 declare_parm_level (0); }
2509 parmlist_1
2510 { $$ = $3;
2511 parmlist_tags_warning ();
2512 poplevel (0, 0, 0); }
2513 ;
2515 parmlist_1:
2516 parmlist_2 ')'
2517 | parms ';'
2518 { tree parm;
2519 if (pedantic)
2520 pedwarn ("ISO C forbids forward parameter declarations");
2521 /* Mark the forward decls as such. */
2522 for (parm = getdecls (); parm; parm = TREE_CHAIN (parm))
2523 TREE_ASM_WRITTEN (parm) = 1;
2524 clear_parm_order (); }
2525 maybe_attribute
2526 { /* Dummy action so attributes are in known place
2527 on parser stack. */ }
2528 parmlist_1
2529 { $$ = $6; }
2530 | error ')'
2531 { $$ = tree_cons (NULL_TREE, NULL_TREE, NULL_TREE); }
2532 ;
2534 /* This is what appears inside the parens in a function declarator.
2535 Is value is represented in the format that grokdeclarator expects. */
2536 parmlist_2: /* empty */
2537 { $$ = get_parm_info (0); }
2538 | ELLIPSIS
2539 { $$ = get_parm_info (0);
2540 /* Gcc used to allow this as an extension. However, it does
2541 not work for all targets, and thus has been disabled.
2542 Also, since func (...) and func () are indistinguishable,
2543 it caused problems with the code in expand_builtin which
2544 tries to verify that BUILT_IN_NEXT_ARG is being used
2545 correctly. */
2546 error ("ISO C requires a named argument before `...'");
2547 }
2548 | parms
2549 { $$ = get_parm_info (1); }
2550 | parms ',' ELLIPSIS
2551 { $$ = get_parm_info (0); }
2552 ;
2554 parms:
2555 firstparm
2556 { push_parm_decl ($1); }
2557 | parms ',' parm
2558 { push_parm_decl ($3); }
2559 ;
2561 /* A single parameter declaration or parameter type name,
2562 as found in a parmlist. */
2563 parm:
2564 declspecs_ts setspecs parm_declarator maybe_attribute
2565 { $$ = build_tree_list (build_tree_list (current_declspecs,
2566 $3),
2567 chainon ($4, prefix_attributes));
2568 current_declspecs = TREE_VALUE (declspec_stack);
2569 prefix_attributes = TREE_PURPOSE (declspec_stack);
2570 declspec_stack = TREE_CHAIN (declspec_stack); }
2571 | declspecs_ts setspecs notype_declarator maybe_attribute
2572 { $$ = build_tree_list (build_tree_list (current_declspecs,
2573 $3),
2574 chainon ($4, prefix_attributes));
2575 current_declspecs = TREE_VALUE (declspec_stack);
2576 prefix_attributes = TREE_PURPOSE (declspec_stack);
2577 declspec_stack = TREE_CHAIN (declspec_stack); }
2578 | declspecs_ts setspecs absdcl_maybe_attribute
2579 { $$ = $3;
2580 current_declspecs = TREE_VALUE (declspec_stack);
2581 prefix_attributes = TREE_PURPOSE (declspec_stack);
2582 declspec_stack = TREE_CHAIN (declspec_stack); }
2583 | declspecs_nots setspecs notype_declarator maybe_attribute
2584 { $$ = build_tree_list (build_tree_list (current_declspecs,
2585 $3),
2586 chainon ($4, prefix_attributes));
2587 current_declspecs = TREE_VALUE (declspec_stack);
2588 prefix_attributes = TREE_PURPOSE (declspec_stack);
2589 declspec_stack = TREE_CHAIN (declspec_stack); }
2591 | declspecs_nots setspecs absdcl_maybe_attribute
2592 { $$ = $3;
2593 current_declspecs = TREE_VALUE (declspec_stack);
2594 prefix_attributes = TREE_PURPOSE (declspec_stack);
2595 declspec_stack = TREE_CHAIN (declspec_stack); }
2596 ;
2598 /* The first parm, which must suck attributes from off the top of the parser
2599 stack. */
2600 firstparm:
2601 declspecs_ts_nosa setspecs_fp parm_declarator maybe_attribute
2602 { $$ = build_tree_list (build_tree_list (current_declspecs,
2603 $3),
2604 chainon ($4, prefix_attributes));
2605 current_declspecs = TREE_VALUE (declspec_stack);
2606 prefix_attributes = TREE_PURPOSE (declspec_stack);
2607 declspec_stack = TREE_CHAIN (declspec_stack); }
2608 | declspecs_ts_nosa setspecs_fp notype_declarator maybe_attribute
2609 { $$ = build_tree_list (build_tree_list (current_declspecs,
2610 $3),
2611 chainon ($4, prefix_attributes));
2612 current_declspecs = TREE_VALUE (declspec_stack);
2613 prefix_attributes = TREE_PURPOSE (declspec_stack);
2614 declspec_stack = TREE_CHAIN (declspec_stack); }
2615 | declspecs_ts_nosa setspecs_fp absdcl_maybe_attribute
2616 { $$ = $3;
2617 current_declspecs = TREE_VALUE (declspec_stack);
2618 prefix_attributes = TREE_PURPOSE (declspec_stack);
2619 declspec_stack = TREE_CHAIN (declspec_stack); }
2620 | declspecs_nots_nosa setspecs_fp notype_declarator maybe_attribute
2621 { $$ = build_tree_list (build_tree_list (current_declspecs,
2622 $3),
2623 chainon ($4, prefix_attributes));
2624 current_declspecs = TREE_VALUE (declspec_stack);
2625 prefix_attributes = TREE_PURPOSE (declspec_stack);
2626 declspec_stack = TREE_CHAIN (declspec_stack); }
2628 | declspecs_nots_nosa setspecs_fp absdcl_maybe_attribute
2629 { $$ = $3;
2630 current_declspecs = TREE_VALUE (declspec_stack);
2631 prefix_attributes = TREE_PURPOSE (declspec_stack);
2632 declspec_stack = TREE_CHAIN (declspec_stack); }
2633 ;
2635 setspecs_fp:
2636 setspecs
2637 { prefix_attributes = chainon (prefix_attributes, $<ttype>-2); }
2638 ;
2640 /* This is used in a function definition
2641 where either a parmlist or an identifier list is ok.
2642 Its value is a list of ..._TYPE nodes or a list of identifiers. */
2643 parmlist_or_identifiers:
2644 { pushlevel (0);
2645 clear_parm_order ();
2646 declare_parm_level (1); }
2647 parmlist_or_identifiers_1
2648 { $$ = $2;
2649 parmlist_tags_warning ();
2650 poplevel (0, 0, 0); }
2651 ;
2653 parmlist_or_identifiers_1:
2654 parmlist_1
2655 | identifiers ')'
2656 { tree t;
2657 for (t = $1; t; t = TREE_CHAIN (t))
2658 if (TREE_VALUE (t) == NULL_TREE)
2659 error ("`...' in old-style identifier list");
2660 $$ = tree_cons (NULL_TREE, NULL_TREE, $1); }
2661 ;
2663 /* A nonempty list of identifiers. */
2664 identifiers:
2665 IDENTIFIER
2666 { $$ = build_tree_list (NULL_TREE, $1); }
2667 | identifiers ',' IDENTIFIER
2668 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2669 ;
2671 /* A nonempty list of identifiers, including typenames. */
2672 identifiers_or_typenames:
2673 identifier
2674 { $$ = build_tree_list (NULL_TREE, $1); }
2675 | identifiers_or_typenames ',' identifier
2676 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2677 ;
2679 extension:
2680 EXTENSION
2681 { $$ = SAVE_WARN_FLAGS();
2682 pedantic = 0;
2683 warn_pointer_arith = 0; }
2684 ;
2685 \f
2686 ifobjc
2687 /* Objective-C productions. */
2689 objcdef:
2690 classdef
2691 | classdecl
2692 | aliasdecl
2693 | protocoldef
2694 | methoddef
2695 | END
2696 {
2697 if (objc_implementation_context)
2698 {
2699 finish_class (objc_implementation_context);
2700 objc_ivar_chain = NULL_TREE;
2701 objc_implementation_context = NULL_TREE;
2702 }
2703 else
2704 warning ("`@end' must appear in an implementation context");
2705 }
2706 ;
2708 /* A nonempty list of identifiers. */
2709 identifier_list:
2710 identifier
2711 { $$ = build_tree_list (NULL_TREE, $1); }
2712 | identifier_list ',' identifier
2713 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2714 ;
2716 classdecl:
2717 CLASS identifier_list ';'
2718 {
2719 objc_declare_class ($2);
2720 }
2722 aliasdecl:
2723 ALIAS identifier identifier ';'
2724 {
2725 objc_declare_alias ($2, $3);
2726 }
2728 classdef:
2729 INTERFACE identifier protocolrefs '{'
2730 {
2731 objc_interface_context = objc_ivar_context
2732 = start_class (CLASS_INTERFACE_TYPE, $2, NULL_TREE, $3);
2733 objc_public_flag = 0;
2734 }
2735 ivar_decl_list '}'
2736 {
2737 continue_class (objc_interface_context);
2738 }
2739 methodprotolist
2740 END
2741 {
2742 finish_class (objc_interface_context);
2743 objc_interface_context = NULL_TREE;
2744 }
2746 | INTERFACE identifier protocolrefs
2747 {
2748 objc_interface_context
2749 = start_class (CLASS_INTERFACE_TYPE, $2, NULL_TREE, $3);
2750 continue_class (objc_interface_context);
2751 }
2752 methodprotolist
2753 END
2754 {
2755 finish_class (objc_interface_context);
2756 objc_interface_context = NULL_TREE;
2757 }
2759 | INTERFACE identifier ':' identifier protocolrefs '{'
2760 {
2761 objc_interface_context = objc_ivar_context
2762 = start_class (CLASS_INTERFACE_TYPE, $2, $4, $5);
2763 objc_public_flag = 0;
2764 }
2765 ivar_decl_list '}'
2766 {
2767 continue_class (objc_interface_context);
2768 }
2769 methodprotolist
2770 END
2771 {
2772 finish_class (objc_interface_context);
2773 objc_interface_context = NULL_TREE;
2774 }
2776 | INTERFACE identifier ':' identifier protocolrefs
2777 {
2778 objc_interface_context
2779 = start_class (CLASS_INTERFACE_TYPE, $2, $4, $5);
2780 continue_class (objc_interface_context);
2781 }
2782 methodprotolist
2783 END
2784 {
2785 finish_class (objc_interface_context);
2786 objc_interface_context = NULL_TREE;
2787 }
2789 | IMPLEMENTATION identifier '{'
2790 {
2791 objc_implementation_context = objc_ivar_context
2792 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, NULL_TREE, NULL_TREE);
2793 objc_public_flag = 0;
2794 }
2795 ivar_decl_list '}'
2796 {
2797 objc_ivar_chain
2798 = continue_class (objc_implementation_context);
2799 }
2801 | IMPLEMENTATION identifier
2802 {
2803 objc_implementation_context
2804 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, NULL_TREE, NULL_TREE);
2805 objc_ivar_chain
2806 = continue_class (objc_implementation_context);
2807 }
2809 | IMPLEMENTATION identifier ':' identifier '{'
2810 {
2811 objc_implementation_context = objc_ivar_context
2812 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2813 objc_public_flag = 0;
2814 }
2815 ivar_decl_list '}'
2816 {
2817 objc_ivar_chain
2818 = continue_class (objc_implementation_context);
2819 }
2821 | IMPLEMENTATION identifier ':' identifier
2822 {
2823 objc_implementation_context
2824 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2825 objc_ivar_chain
2826 = continue_class (objc_implementation_context);
2827 }
2829 | INTERFACE identifier '(' identifier ')' protocolrefs
2830 {
2831 objc_interface_context
2832 = start_class (CATEGORY_INTERFACE_TYPE, $2, $4, $6);
2833 continue_class (objc_interface_context);
2834 }
2835 methodprotolist
2836 END
2837 {
2838 finish_class (objc_interface_context);
2839 objc_interface_context = NULL_TREE;
2840 }
2842 | IMPLEMENTATION identifier '(' identifier ')'
2843 {
2844 objc_implementation_context
2845 = start_class (CATEGORY_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2846 objc_ivar_chain
2847 = continue_class (objc_implementation_context);
2848 }
2849 ;
2851 protocoldef:
2852 PROTOCOL identifier protocolrefs
2853 {
2854 objc_pq_context = 1;
2855 objc_interface_context
2856 = start_protocol(PROTOCOL_INTERFACE_TYPE, $2, $3);
2857 }
2858 methodprotolist END
2859 {
2860 objc_pq_context = 0;
2861 finish_protocol(objc_interface_context);
2862 objc_interface_context = NULL_TREE;
2863 }
2864 ;
2866 protocolrefs:
2867 /* empty */
2868 {
2869 $$ = NULL_TREE;
2870 }
2871 | non_empty_protocolrefs
2872 ;
2874 non_empty_protocolrefs:
2875 ARITHCOMPARE identifier_list ARITHCOMPARE
2876 {
2877 if ($1 == LT_EXPR && $3 == GT_EXPR)
2878 $$ = $2;
2879 else
2880 YYERROR1;
2881 }
2882 ;
2884 ivar_decl_list:
2885 ivar_decl_list visibility_spec ivar_decls
2886 | ivar_decls
2887 ;
2889 visibility_spec:
2890 PRIVATE { objc_public_flag = 2; }
2891 | PROTECTED { objc_public_flag = 0; }
2892 | PUBLIC { objc_public_flag = 1; }
2893 ;
2895 ivar_decls:
2896 /* empty */
2897 {
2898 $$ = NULL_TREE;
2899 }
2900 | ivar_decls ivar_decl ';'
2901 | ivar_decls ';'
2902 {
2903 if (pedantic)
2904 pedwarn ("extra semicolon in struct or union specified");
2905 }
2906 ;
2909 /* There is a shift-reduce conflict here, because `components' may
2910 start with a `typename'. It happens that shifting (the default resolution)
2911 does the right thing, because it treats the `typename' as part of
2912 a `typed_typespecs'.
2914 It is possible that this same technique would allow the distinction
2915 between `notype_initdecls' and `initdecls' to be eliminated.
2916 But I am being cautious and not trying it. */
2918 ivar_decl:
2919 declspecs_nosc_ts setspecs ivars
2920 { $$ = $3;
2921 current_declspecs = TREE_VALUE (declspec_stack);
2922 prefix_attributes = TREE_PURPOSE (declspec_stack);
2923 declspec_stack = TREE_CHAIN (declspec_stack); }
2924 | declspecs_nosc_nots setspecs ivars
2925 { $$ = $3;
2926 current_declspecs = TREE_VALUE (declspec_stack);
2927 prefix_attributes = TREE_PURPOSE (declspec_stack);
2928 declspec_stack = TREE_CHAIN (declspec_stack); }
2929 | error
2930 { $$ = NULL_TREE; }
2931 ;
2933 ivars:
2934 /* empty */
2935 { $$ = NULL_TREE; }
2936 | ivar_declarator
2937 | ivars ',' maybe_setattrs ivar_declarator
2938 ;
2940 ivar_declarator:
2941 declarator
2942 {
2943 $$ = add_instance_variable (objc_ivar_context,
2944 objc_public_flag,
2945 $1, current_declspecs,
2946 NULL_TREE);
2947 }
2948 | declarator ':' expr_no_commas
2949 {
2950 $$ = add_instance_variable (objc_ivar_context,
2951 objc_public_flag,
2952 $1, current_declspecs, $3);
2953 }
2954 | ':' expr_no_commas
2955 {
2956 $$ = add_instance_variable (objc_ivar_context,
2957 objc_public_flag,
2958 NULL_TREE,
2959 current_declspecs, $2);
2960 }
2961 ;
2963 methodtype:
2964 '+'
2965 { objc_inherit_code = CLASS_METHOD_DECL; }
2966 | '-'
2967 { objc_inherit_code = INSTANCE_METHOD_DECL; }
2968 ;
2970 methoddef:
2971 methodtype
2972 {
2973 objc_pq_context = 1;
2974 if (!objc_implementation_context)
2975 fatal_error ("method definition not in class context");
2976 }
2977 methoddecl
2978 {
2979 objc_pq_context = 0;
2980 if (objc_inherit_code == CLASS_METHOD_DECL)
2981 add_class_method (objc_implementation_context, $3);
2982 else
2983 add_instance_method (objc_implementation_context, $3);
2984 start_method_def ($3);
2985 objc_method_context = $3;
2986 }
2987 optarglist
2988 {
2989 continue_method_def ();
2990 }
2991 compstmt_or_error
2992 {
2993 finish_method_def ();
2994 objc_method_context = NULL_TREE;
2995 }
2996 ;
2998 /* the reason for the strange actions in this rule
2999 is so that notype_initdecls when reached via datadef
3000 can find a valid list of type and sc specs in $0. */
3002 methodprotolist:
3003 /* empty */
3004 | {$<ttype>$ = NULL_TREE; } methodprotolist2
3005 ;
3007 methodprotolist2: /* eliminates a shift/reduce conflict */
3008 methodproto
3009 | datadef
3010 | methodprotolist2 methodproto
3011 | methodprotolist2 {$<ttype>$ = NULL_TREE; } datadef
3012 ;
3014 semi_or_error:
3015 ';'
3016 | error
3017 ;
3019 methodproto:
3020 methodtype
3021 {
3022 /* Remember protocol qualifiers in prototypes. */
3023 objc_pq_context = 1;
3024 }
3025 methoddecl
3026 {
3027 /* Forget protocol qualifiers here. */
3028 objc_pq_context = 0;
3029 if (objc_inherit_code == CLASS_METHOD_DECL)
3030 add_class_method (objc_interface_context, $3);
3031 else
3032 add_instance_method (objc_interface_context, $3);
3033 }
3034 semi_or_error
3035 ;
3037 methoddecl:
3038 '(' typename ')' unaryselector
3039 {
3040 $$ = build_method_decl (objc_inherit_code, $2, $4, NULL_TREE);
3041 }
3043 | unaryselector
3044 {
3045 $$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, NULL_TREE);
3046 }
3048 | '(' typename ')' keywordselector optparmlist
3049 {
3050 $$ = build_method_decl (objc_inherit_code, $2, $4, $5);
3051 }
3053 | keywordselector optparmlist
3054 {
3055 $$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, $2);
3056 }
3057 ;
3059 /* "optarglist" assumes that start_method_def has already been called...
3060 if it is not, the "xdecls" will not be placed in the proper scope */
3062 optarglist:
3063 /* empty */
3064 | ';' myxdecls
3065 ;
3067 /* to get around the following situation: "int foo (int a) int b; {}" that
3068 is synthesized when parsing "- a:a b:b; id c; id d; { ... }" */
3070 myxdecls:
3071 /* empty */
3072 | mydecls
3073 ;
3075 mydecls:
3076 mydecl
3077 | errstmt
3078 | mydecls mydecl
3079 | mydecl errstmt
3080 ;
3082 mydecl:
3083 declspecs_ts setspecs myparms ';'
3084 { current_declspecs = TREE_VALUE (declspec_stack);
3085 prefix_attributes = TREE_PURPOSE (declspec_stack);
3086 declspec_stack = TREE_CHAIN (declspec_stack); }
3087 | declspecs_ts ';'
3088 { shadow_tag ($1); }
3089 | declspecs_nots ';'
3090 { pedwarn ("empty declaration"); }
3091 ;
3093 myparms:
3094 myparm
3095 { push_parm_decl ($1); }
3096 | myparms ',' myparm
3097 { push_parm_decl ($3); }
3098 ;
3100 /* A single parameter declaration or parameter type name,
3101 as found in a parmlist. DOES NOT ALLOW AN INITIALIZER OR ASMSPEC */
3103 myparm:
3104 parm_declarator maybe_attribute
3105 { $$ = build_tree_list (build_tree_list (current_declspecs,
3106 $1),
3107 chainon ($2, prefix_attributes)); }
3108 | notype_declarator maybe_attribute
3109 { $$ = build_tree_list (build_tree_list (current_declspecs,
3110 $1),
3111 chainon ($2, prefix_attributes)); }
3112 | absdcl_maybe_attribute
3113 { $$ = $1; }
3114 ;
3116 optparmlist:
3117 /* empty */
3118 {
3119 $$ = NULL_TREE;
3120 }
3121 | ',' ELLIPSIS
3122 {
3123 /* oh what a kludge! */
3124 $$ = objc_ellipsis_node;
3125 }
3126 | ','
3127 {
3128 pushlevel (0);
3129 }
3130 parmlist_2
3131 {
3132 /* returns a tree list node generated by get_parm_info */
3133 $$ = $3;
3134 poplevel (0, 0, 0);
3135 }
3136 ;
3138 unaryselector:
3139 selector
3140 ;
3142 keywordselector:
3143 keyworddecl
3145 | keywordselector keyworddecl
3146 {
3147 $$ = chainon ($1, $2);
3148 }
3149 ;
3151 selector:
3152 IDENTIFIER
3153 | TYPENAME
3154 | OBJECTNAME
3155 | reservedwords
3156 ;
3158 reservedwords:
3159 ENUM | STRUCT | UNION | IF | ELSE | WHILE | DO | FOR
3160 | SWITCH | CASE | DEFAULT | BREAK | CONTINUE | RETURN
3161 | GOTO | ASM_KEYWORD | SIZEOF | TYPEOF | ALIGNOF
3162 | TYPESPEC | TYPE_QUAL
3163 ;
3165 keyworddecl:
3166 selector ':' '(' typename ')' identifier
3167 {
3168 $$ = build_keyword_decl ($1, $4, $6);
3169 }
3171 | selector ':' identifier
3172 {
3173 $$ = build_keyword_decl ($1, NULL_TREE, $3);
3174 }
3176 | ':' '(' typename ')' identifier
3177 {
3178 $$ = build_keyword_decl (NULL_TREE, $3, $5);
3179 }
3181 | ':' identifier
3182 {
3183 $$ = build_keyword_decl (NULL_TREE, NULL_TREE, $2);
3184 }
3185 ;
3187 messageargs:
3188 selector
3189 | keywordarglist
3190 ;
3192 keywordarglist:
3193 keywordarg
3194 | keywordarglist keywordarg
3195 {
3196 $$ = chainon ($1, $2);
3197 }
3198 ;
3201 keywordexpr:
3202 nonnull_exprlist
3203 {
3204 if (TREE_CHAIN ($1) == NULL_TREE)
3205 /* just return the expr., remove a level of indirection */
3206 $$ = TREE_VALUE ($1);
3207 else
3208 /* we have a comma expr., we will collapse later */
3209 $$ = $1;
3210 }
3211 ;
3213 keywordarg:
3214 selector ':' keywordexpr
3215 {
3216 $$ = build_tree_list ($1, $3);
3217 }
3218 | ':' keywordexpr
3219 {
3220 $$ = build_tree_list (NULL_TREE, $2);
3221 }
3222 ;
3224 receiver:
3225 expr
3226 | CLASSNAME
3227 {
3228 $$ = get_class_reference ($1);
3229 }
3230 ;
3232 objcmessageexpr:
3233 '['
3234 { objc_receiver_context = 1; }
3235 receiver
3236 { objc_receiver_context = 0; }
3237 messageargs ']'
3238 {
3239 $$ = build_tree_list ($3, $5);
3240 }
3241 ;
3243 selectorarg:
3244 selector
3245 | keywordnamelist
3246 ;
3248 keywordnamelist:
3249 keywordname
3250 | keywordnamelist keywordname
3251 {
3252 $$ = chainon ($1, $2);
3253 }
3254 ;
3256 keywordname:
3257 selector ':'
3258 {
3259 $$ = build_tree_list ($1, NULL_TREE);
3260 }
3261 | ':'
3262 {
3263 $$ = build_tree_list (NULL_TREE, NULL_TREE);
3264 }
3265 ;
3267 objcselectorexpr:
3268 SELECTOR '(' selectorarg ')'
3269 {
3270 $$ = $3;
3271 }
3272 ;
3274 objcprotocolexpr:
3275 PROTOCOL '(' identifier ')'
3276 {
3277 $$ = $3;
3278 }
3279 ;
3281 /* extension to support C-structures in the archiver */
3283 objcencodeexpr:
3284 ENCODE '(' typename ')'
3285 {
3286 $$ = groktypename ($3);
3287 }
3288 ;
3290 end ifobjc
3291 %%
3293 /* yylex() is a thin wrapper around c_lex(), all it does is translate
3294 cpplib.h's token codes into yacc's token codes. */
3296 static enum cpp_ttype last_token;
3298 /* The reserved keyword table. */
3299 struct resword
3300 {
3301 const char *word;
3302 ENUM_BITFIELD(rid) rid : 16;
3303 unsigned int disable : 16;
3304 };
3306 /* Disable mask. Keywords are disabled if (reswords[i].disable & mask) is
3307 _true_. */
3308 #define D_TRAD 0x01 /* not in traditional C */
3309 #define D_C89 0x02 /* not in C89 */
3310 #define D_EXT 0x04 /* GCC extension */
3311 #define D_EXT89 0x08 /* GCC extension incorporated in C99 */
3312 #define D_OBJC 0x10 /* Objective C only */
3314 static const struct resword reswords[] =
3315 {
3316 { "_Bool", RID_BOOL, 0 },
3317 { "_Complex", RID_COMPLEX, 0 },
3318 { "__FUNCTION__", RID_FUNCTION_NAME, 0 },
3319 { "__PRETTY_FUNCTION__", RID_PRETTY_FUNCTION_NAME, 0 },
3320 { "__alignof", RID_ALIGNOF, 0 },
3321 { "__alignof__", RID_ALIGNOF, 0 },
3322 { "__asm", RID_ASM, 0 },
3323 { "__asm__", RID_ASM, 0 },
3324 { "__attribute", RID_ATTRIBUTE, 0 },
3325 { "__attribute__", RID_ATTRIBUTE, 0 },
3326 { "__bounded", RID_BOUNDED, 0 },
3327 { "__bounded__", RID_BOUNDED, 0 },
3328 { "__builtin_va_arg", RID_VA_ARG, 0 },
3329 { "__complex", RID_COMPLEX, 0 },
3330 { "__complex__", RID_COMPLEX, 0 },
3331 { "__const", RID_CONST, 0 },
3332 { "__const__", RID_CONST, 0 },
3333 { "__extension__", RID_EXTENSION, 0 },
3334 { "__func__", RID_C99_FUNCTION_NAME, 0 },
3335 { "__imag", RID_IMAGPART, 0 },
3336 { "__imag__", RID_IMAGPART, 0 },
3337 { "__inline", RID_INLINE, 0 },
3338 { "__inline__", RID_INLINE, 0 },
3339 { "__label__", RID_LABEL, 0 },
3340 { "__ptrbase", RID_PTRBASE, 0 },
3341 { "__ptrbase__", RID_PTRBASE, 0 },
3342 { "__ptrextent", RID_PTREXTENT, 0 },
3343 { "__ptrextent__", RID_PTREXTENT, 0 },
3344 { "__ptrvalue", RID_PTRVALUE, 0 },
3345 { "__ptrvalue__", RID_PTRVALUE, 0 },
3346 { "__real", RID_REALPART, 0 },
3347 { "__real__", RID_REALPART, 0 },
3348 { "__restrict", RID_RESTRICT, 0 },
3349 { "__restrict__", RID_RESTRICT, 0 },
3350 { "__signed", RID_SIGNED, 0 },
3351 { "__signed__", RID_SIGNED, 0 },
3352 { "__typeof", RID_TYPEOF, 0 },
3353 { "__typeof__", RID_TYPEOF, 0 },
3354 { "__unbounded", RID_UNBOUNDED, 0 },
3355 { "__unbounded__", RID_UNBOUNDED, 0 },
3356 { "__volatile", RID_VOLATILE, 0 },
3357 { "__volatile__", RID_VOLATILE, 0 },
3358 { "asm", RID_ASM, D_EXT },
3359 { "auto", RID_AUTO, 0 },
3360 { "break", RID_BREAK, 0 },
3361 { "case", RID_CASE, 0 },
3362 { "char", RID_CHAR, 0 },
3363 { "const", RID_CONST, D_TRAD },
3364 { "continue", RID_CONTINUE, 0 },
3365 { "default", RID_DEFAULT, 0 },
3366 { "do", RID_DO, 0 },
3367 { "double", RID_DOUBLE, 0 },
3368 { "else", RID_ELSE, 0 },
3369 { "enum", RID_ENUM, 0 },
3370 { "extern", RID_EXTERN, 0 },
3371 { "float", RID_FLOAT, 0 },
3372 { "for", RID_FOR, 0 },
3373 { "goto", RID_GOTO, 0 },
3374 { "if", RID_IF, 0 },
3375 { "inline", RID_INLINE, D_TRAD|D_EXT89 },
3376 { "int", RID_INT, 0 },
3377 { "long", RID_LONG, 0 },
3378 { "register", RID_REGISTER, 0 },
3379 { "restrict", RID_RESTRICT, D_TRAD|D_C89 },
3380 { "return", RID_RETURN, 0 },
3381 { "short", RID_SHORT, 0 },
3382 { "signed", RID_SIGNED, D_TRAD },
3383 { "sizeof", RID_SIZEOF, 0 },
3384 { "static", RID_STATIC, 0 },
3385 { "struct", RID_STRUCT, 0 },
3386 { "switch", RID_SWITCH, 0 },
3387 { "typedef", RID_TYPEDEF, 0 },
3388 { "typeof", RID_TYPEOF, D_TRAD|D_EXT },
3389 { "union", RID_UNION, 0 },
3390 { "unsigned", RID_UNSIGNED, 0 },
3391 { "void", RID_VOID, 0 },
3392 { "volatile", RID_VOLATILE, D_TRAD },
3393 { "while", RID_WHILE, 0 },
3394 ifobjc
3395 { "id", RID_ID, D_OBJC },
3397 /* These objc keywords are recognized only immediately after
3398 an '@'. */
3399 { "class", RID_AT_CLASS, D_OBJC },
3400 { "compatibility_alias", RID_AT_ALIAS, D_OBJC },
3401 { "defs", RID_AT_DEFS, D_OBJC },
3402 { "encode", RID_AT_ENCODE, D_OBJC },
3403 { "end", RID_AT_END, D_OBJC },
3404 { "implementation", RID_AT_IMPLEMENTATION, D_OBJC },
3405 { "interface", RID_AT_INTERFACE, D_OBJC },
3406 { "private", RID_AT_PRIVATE, D_OBJC },
3407 { "protected", RID_AT_PROTECTED, D_OBJC },
3408 { "protocol", RID_AT_PROTOCOL, D_OBJC },
3409 { "public", RID_AT_PUBLIC, D_OBJC },
3410 { "selector", RID_AT_SELECTOR, D_OBJC },
3412 /* These are recognized only in protocol-qualifier context
3413 (see above) */
3414 { "bycopy", RID_BYCOPY, D_OBJC },
3415 { "byref", RID_BYREF, D_OBJC },
3416 { "in", RID_IN, D_OBJC },
3417 { "inout", RID_INOUT, D_OBJC },
3418 { "oneway", RID_ONEWAY, D_OBJC },
3419 { "out", RID_OUT, D_OBJC },
3420 end ifobjc
3421 };
3422 #define N_reswords (sizeof reswords / sizeof (struct resword))
3424 /* Table mapping from RID_* constants to yacc token numbers.
3425 Unfortunately we have to have entries for all the keywords in all
3426 three languages. */
3427 static const short rid_to_yy[RID_MAX] =
3428 {
3429 /* RID_STATIC */ SCSPEC,
3430 /* RID_UNSIGNED */ TYPESPEC,
3431 /* RID_LONG */ TYPESPEC,
3432 /* RID_CONST */ TYPE_QUAL,
3433 /* RID_EXTERN */ SCSPEC,
3434 /* RID_REGISTER */ SCSPEC,
3435 /* RID_TYPEDEF */ SCSPEC,
3436 /* RID_SHORT */ TYPESPEC,
3437 /* RID_INLINE */ SCSPEC,
3438 /* RID_VOLATILE */ TYPE_QUAL,
3439 /* RID_SIGNED */ TYPESPEC,
3440 /* RID_AUTO */ SCSPEC,
3441 /* RID_RESTRICT */ TYPE_QUAL,
3443 /* C extensions */
3444 /* RID_BOUNDED */ TYPE_QUAL,
3445 /* RID_UNBOUNDED */ TYPE_QUAL,
3446 /* RID_COMPLEX */ TYPESPEC,
3448 /* C++ */
3449 /* RID_FRIEND */ 0,
3450 /* RID_VIRTUAL */ 0,
3451 /* RID_EXPLICIT */ 0,
3452 /* RID_EXPORT */ 0,
3453 /* RID_MUTABLE */ 0,
3455 /* ObjC */
3456 /* RID_IN */ TYPE_QUAL,
3457 /* RID_OUT */ TYPE_QUAL,
3458 /* RID_INOUT */ TYPE_QUAL,
3459 /* RID_BYCOPY */ TYPE_QUAL,
3460 /* RID_BYREF */ TYPE_QUAL,
3461 /* RID_ONEWAY */ TYPE_QUAL,
3463 /* C */
3464 /* RID_INT */ TYPESPEC,
3465 /* RID_CHAR */ TYPESPEC,
3466 /* RID_FLOAT */ TYPESPEC,
3467 /* RID_DOUBLE */ TYPESPEC,
3468 /* RID_VOID */ TYPESPEC,
3469 /* RID_ENUM */ ENUM,
3470 /* RID_STRUCT */ STRUCT,
3471 /* RID_UNION */ UNION,
3472 /* RID_IF */ IF,
3473 /* RID_ELSE */ ELSE,
3474 /* RID_WHILE */ WHILE,
3475 /* RID_DO */ DO,
3476 /* RID_FOR */ FOR,
3477 /* RID_SWITCH */ SWITCH,
3478 /* RID_CASE */ CASE,
3479 /* RID_DEFAULT */ DEFAULT,
3480 /* RID_BREAK */ BREAK,
3481 /* RID_CONTINUE */ CONTINUE,
3482 /* RID_RETURN */ RETURN,
3483 /* RID_GOTO */ GOTO,
3484 /* RID_SIZEOF */ SIZEOF,
3486 /* C extensions */
3487 /* RID_ASM */ ASM_KEYWORD,
3488 /* RID_TYPEOF */ TYPEOF,
3489 /* RID_ALIGNOF */ ALIGNOF,
3490 /* RID_ATTRIBUTE */ ATTRIBUTE,
3491 /* RID_VA_ARG */ VA_ARG,
3492 /* RID_EXTENSION */ EXTENSION,
3493 /* RID_IMAGPART */ IMAGPART,
3494 /* RID_REALPART */ REALPART,
3495 /* RID_LABEL */ LABEL,
3496 /* RID_PTRBASE */ PTR_BASE,
3497 /* RID_PTREXTENT */ PTR_EXTENT,
3498 /* RID_PTRVALUE */ PTR_VALUE,
3500 /* RID_FUNCTION_NAME */ STRING_FUNC_NAME,
3501 /* RID_PRETTY_FUNCTION_NAME */ STRING_FUNC_NAME,
3502 /* RID_C99_FUNCTION_NAME */ VAR_FUNC_NAME,
3504 /* C++ */
3505 /* RID_BOOL */ TYPESPEC,
3506 /* RID_WCHAR */ 0,
3507 /* RID_CLASS */ 0,
3508 /* RID_PUBLIC */ 0,
3509 /* RID_PRIVATE */ 0,
3510 /* RID_PROTECTED */ 0,
3511 /* RID_TEMPLATE */ 0,
3512 /* RID_NULL */ 0,
3513 /* RID_CATCH */ 0,
3514 /* RID_DELETE */ 0,
3515 /* RID_FALSE */ 0,
3516 /* RID_NAMESPACE */ 0,
3517 /* RID_NEW */ 0,
3518 /* RID_OPERATOR */ 0,
3519 /* RID_THIS */ 0,
3520 /* RID_THROW */ 0,
3521 /* RID_TRUE */ 0,
3522 /* RID_TRY */ 0,
3523 /* RID_TYPENAME */ 0,
3524 /* RID_TYPEID */ 0,
3525 /* RID_USING */ 0,
3527 /* casts */
3528 /* RID_CONSTCAST */ 0,
3529 /* RID_DYNCAST */ 0,
3530 /* RID_REINTCAST */ 0,
3531 /* RID_STATCAST */ 0,
3533 /* alternate spellings */
3534 /* RID_AND */ 0,
3535 /* RID_AND_EQ */ 0,
3536 /* RID_NOT */ 0,
3537 /* RID_NOT_EQ */ 0,
3538 /* RID_OR */ 0,
3539 /* RID_OR_EQ */ 0,
3540 /* RID_XOR */ 0,
3541 /* RID_XOR_EQ */ 0,
3542 /* RID_BITAND */ 0,
3543 /* RID_BITOR */ 0,
3544 /* RID_COMPL */ 0,
3546 /* Objective C */
3547 /* RID_ID */ OBJECTNAME,
3548 /* RID_AT_ENCODE */ ENCODE,
3549 /* RID_AT_END */ END,
3550 /* RID_AT_CLASS */ CLASS,
3551 /* RID_AT_ALIAS */ ALIAS,
3552 /* RID_AT_DEFS */ DEFS,
3553 /* RID_AT_PRIVATE */ PRIVATE,
3554 /* RID_AT_PROTECTED */ PROTECTED,
3555 /* RID_AT_PUBLIC */ PUBLIC,
3556 /* RID_AT_PROTOCOL */ PROTOCOL,
3557 /* RID_AT_SELECTOR */ SELECTOR,
3558 /* RID_AT_INTERFACE */ INTERFACE,
3559 /* RID_AT_IMPLEMENTATION */ IMPLEMENTATION
3560 };
3562 static void
3563 init_reswords ()
3564 {
3565 unsigned int i;
3566 tree id;
3567 int mask = (flag_isoc99 ? 0 : D_C89)
3568 | (flag_traditional ? D_TRAD : 0)
3569 | (flag_no_asm ? (flag_isoc99 ? D_EXT : D_EXT|D_EXT89) : 0);
3571 if (c_language != clk_objective_c)
3572 mask |= D_OBJC;
3574 /* It is not necessary to register ridpointers as a GC root, because
3575 all the trees it points to are permanently interned in the
3576 get_identifier hash anyway. */
3577 ridpointers = (tree *) xcalloc ((int) RID_MAX, sizeof (tree));
3578 for (i = 0; i < N_reswords; i++)
3579 {
3580 /* If a keyword is disabled, do not enter it into the table
3581 and so create a canonical spelling that isn't a keyword. */
3582 if (reswords[i].disable & mask)
3583 continue;
3585 id = get_identifier (reswords[i].word);
3586 C_RID_CODE (id) = reswords[i].rid;
3587 C_IS_RESERVED_WORD (id) = 1;
3588 ridpointers [(int) reswords[i].rid] = id;
3589 }
3590 }
3592 const char *
3593 init_parse (filename)
3594 const char *filename;
3595 {
3596 add_c_tree_codes ();
3598 /* Make identifier nodes long enough for the language-specific slots. */
3599 set_identifier_size (sizeof (struct lang_identifier));
3601 init_reswords ();
3602 init_pragma ();
3604 return init_c_lex (filename);
3605 }
3607 void
3608 finish_parse ()
3609 {
3610 cpp_finish (parse_in);
3611 /* Call to cpp_destroy () omitted for performance reasons. */
3612 errorcount += cpp_errors (parse_in);
3613 }
3615 #define NAME(type) cpp_type2name (type)
3617 static void
3618 yyerror (msgid)
3619 const char *msgid;
3620 {
3621 const char *string = _(msgid);
3623 if (last_token == CPP_EOF)
3624 error ("%s at end of input", string);
3625 else if (last_token == CPP_CHAR || last_token == CPP_WCHAR)
3626 {
3627 unsigned int val = TREE_INT_CST_LOW (yylval.ttype);
3628 const char *ell = (last_token == CPP_CHAR) ? "" : "L";
3629 if (val <= UCHAR_MAX && ISGRAPH (val))
3630 error ("%s before %s'%c'", string, ell, val);
3631 else
3632 error ("%s before %s'\\x%x'", string, ell, val);
3633 }
3634 else if (last_token == CPP_STRING
3635 || last_token == CPP_WSTRING)
3636 error ("%s before string constant", string);
3637 else if (last_token == CPP_NUMBER
3638 || last_token == CPP_INT
3639 || last_token == CPP_FLOAT)
3640 error ("%s before numeric constant", string);
3641 else if (last_token == CPP_NAME)
3642 error ("%s before \"%s\"", string, IDENTIFIER_POINTER (yylval.ttype));
3643 else
3644 error ("%s before '%s' token", string, NAME(last_token));
3645 }
3647 static int
3648 yylexname ()
3649 {
3650 tree decl;
3652 if (C_IS_RESERVED_WORD (yylval.ttype))
3653 {
3654 enum rid rid_code = C_RID_CODE (yylval.ttype);
3656 ifobjc
3657 if (!OBJC_IS_AT_KEYWORD (rid_code)
3658 && (!OBJC_IS_PQ_KEYWORD (rid_code) || objc_pq_context))
3659 end ifobjc
3660 {
3661 int yycode = rid_to_yy[(int) rid_code];
3662 if (yycode == STRING_FUNC_NAME)
3663 {
3664 /* __FUNCTION__ and __PRETTY_FUNCTION__ get converted
3665 to string constants. */
3666 const char *name = fname_string (rid_code);
3668 yylval.ttype = build_string (strlen (name) + 1, name);
3669 last_token = CPP_STRING; /* so yyerror won't choke */
3670 return STRING;
3671 }
3673 /* Return the canonical spelling for this keyword. */
3674 yylval.ttype = ridpointers[(int) rid_code];
3675 return yycode;
3676 }
3677 }
3679 decl = lookup_name (yylval.ttype);
3680 if (decl)
3681 {
3682 if (TREE_CODE (decl) == TYPE_DECL)
3683 return TYPENAME;
3684 }
3685 ifobjc
3686 else
3687 {
3688 tree objc_interface_decl = is_class_name (yylval.ttype);
3690 if (objc_interface_decl)
3691 {
3692 yylval.ttype = objc_interface_decl;
3693 return CLASSNAME;
3694 }
3695 }
3696 end ifobjc
3698 return IDENTIFIER;
3699 }
3702 static inline int
3703 _yylex ()
3704 {
3705 get_next:
3706 last_token = c_lex (&yylval.ttype);
3707 switch (last_token)
3708 {
3709 case CPP_EQ: return '=';
3710 case CPP_NOT: return '!';
3711 case CPP_GREATER: yylval.code = GT_EXPR; return ARITHCOMPARE;
3712 case CPP_LESS: yylval.code = LT_EXPR; return ARITHCOMPARE;
3713 case CPP_PLUS: yylval.code = PLUS_EXPR; return '+';
3714 case CPP_MINUS: yylval.code = MINUS_EXPR; return '-';
3715 case CPP_MULT: yylval.code = MULT_EXPR; return '*';
3716 case CPP_DIV: yylval.code = TRUNC_DIV_EXPR; return '/';
3717 case CPP_MOD: yylval.code = TRUNC_MOD_EXPR; return '%';
3718 case CPP_AND: yylval.code = BIT_AND_EXPR; return '&';
3719 case CPP_OR: yylval.code = BIT_IOR_EXPR; return '|';
3720 case CPP_XOR: yylval.code = BIT_XOR_EXPR; return '^';
3721 case CPP_RSHIFT: yylval.code = RSHIFT_EXPR; return RSHIFT;
3722 case CPP_LSHIFT: yylval.code = LSHIFT_EXPR; return LSHIFT;
3724 case CPP_COMPL: return '~';
3725 case CPP_AND_AND: return ANDAND;
3726 case CPP_OR_OR: return OROR;
3727 case CPP_QUERY: return '?';
3728 case CPP_COLON: return ':';
3729 case CPP_COMMA: return ',';
3730 case CPP_OPEN_PAREN: return '(';
3731 case CPP_CLOSE_PAREN: return ')';
3732 case CPP_EQ_EQ: yylval.code = EQ_EXPR; return EQCOMPARE;
3733 case CPP_NOT_EQ: yylval.code = NE_EXPR; return EQCOMPARE;
3734 case CPP_GREATER_EQ:yylval.code = GE_EXPR; return ARITHCOMPARE;
3735 case CPP_LESS_EQ: yylval.code = LE_EXPR; return ARITHCOMPARE;
3737 case CPP_PLUS_EQ: yylval.code = PLUS_EXPR; return ASSIGN;
3738 case CPP_MINUS_EQ: yylval.code = MINUS_EXPR; return ASSIGN;
3739 case CPP_MULT_EQ: yylval.code = MULT_EXPR; return ASSIGN;
3740 case CPP_DIV_EQ: yylval.code = TRUNC_DIV_EXPR; return ASSIGN;
3741 case CPP_MOD_EQ: yylval.code = TRUNC_MOD_EXPR; return ASSIGN;
3742 case CPP_AND_EQ: yylval.code = BIT_AND_EXPR; return ASSIGN;
3743 case CPP_OR_EQ: yylval.code = BIT_IOR_EXPR; return ASSIGN;
3744 case CPP_XOR_EQ: yylval.code = BIT_XOR_EXPR; return ASSIGN;
3745 case CPP_RSHIFT_EQ: yylval.code = RSHIFT_EXPR; return ASSIGN;
3746 case CPP_LSHIFT_EQ: yylval.code = LSHIFT_EXPR; return ASSIGN;
3748 case CPP_OPEN_SQUARE: return '[';
3749 case CPP_CLOSE_SQUARE: return ']';
3750 case CPP_OPEN_BRACE: return '{';
3751 case CPP_CLOSE_BRACE: return '}';
3752 case CPP_SEMICOLON: return ';';
3753 case CPP_ELLIPSIS: return ELLIPSIS;
3755 case CPP_PLUS_PLUS: return PLUSPLUS;
3756 case CPP_MINUS_MINUS: return MINUSMINUS;
3757 case CPP_DEREF: return POINTSAT;
3758 case CPP_DOT: return '.';
3760 case CPP_EOF:
3761 if (cpp_pop_buffer (parse_in) == 0)
3762 return 0;
3763 goto get_next;
3765 case CPP_NAME:
3766 return yylexname ();
3768 case CPP_INT:
3769 case CPP_FLOAT:
3770 case CPP_NUMBER:
3771 case CPP_CHAR:
3772 case CPP_WCHAR:
3773 return CONSTANT;
3775 case CPP_STRING:
3776 case CPP_WSTRING:
3777 return STRING;
3779 /* This token is Objective-C specific. It gives the next
3780 token special significance. */
3781 case CPP_ATSIGN:
3782 ifobjc
3783 {
3784 tree after_at;
3785 enum cpp_ttype after_at_type;
3787 cpp_start_lookahead (parse_in);
3788 after_at_type = c_lex (&after_at);
3790 if (after_at_type == CPP_NAME
3791 && C_IS_RESERVED_WORD (after_at)
3792 && OBJC_IS_AT_KEYWORD (C_RID_CODE (after_at)))
3793 {
3794 cpp_stop_lookahead (parse_in, 1); /* accept this token */
3795 yylval.ttype = after_at;
3796 last_token = after_at_type;
3797 return rid_to_yy [(int) C_RID_CODE (after_at)];
3798 }
3799 cpp_stop_lookahead (parse_in, 0); /* put back this token */
3800 return '@';
3801 }
3802 end ifobjc
3804 /* These tokens are C++ specific (and will not be generated
3805 in C mode, but let's be cautious). */
3806 case CPP_SCOPE:
3807 case CPP_DEREF_STAR:
3808 case CPP_DOT_STAR:
3809 case CPP_MIN_EQ:
3810 case CPP_MAX_EQ:
3811 case CPP_MIN:
3812 case CPP_MAX:
3813 /* These tokens should not survive translation phase 4. */
3814 case CPP_HASH:
3815 case CPP_PASTE:
3816 error ("syntax error at '%s' token", NAME(last_token));
3817 goto get_next;
3819 default:
3820 abort ();
3821 }
3822 /* NOTREACHED */
3823 }
3825 static int
3826 yylex()
3827 {
3828 int r;
3829 timevar_push (TV_LEX);
3830 r = _yylex();
3831 timevar_pop (TV_LEX);
3832 return r;
3833 }
3835 /* Sets the value of the 'yydebug' variable to VALUE.
3836 This is a function so we don't have to have YYDEBUG defined
3837 in order to build the compiler. */
3839 void
3840 set_yydebug (value)
3841 int value;
3842 {
3843 #if YYDEBUG != 0
3844 yydebug = value;
3845 #else
3846 warning ("YYDEBUG not defined.");
3847 #endif
3848 }
3850 /* Function used when yydebug is set, to print a token in more detail. */
3852 static void
3853 yyprint (file, yychar, yyl)
3854 FILE *file;
3855 int yychar;
3856 YYSTYPE yyl;
3857 {
3858 tree t = yyl.ttype;
3860 fprintf (file, " [%s]", NAME(last_token));
3862 switch (yychar)
3863 {
3864 case IDENTIFIER:
3865 case TYPENAME:
3866 case OBJECTNAME:
3867 case TYPESPEC:
3868 case TYPE_QUAL:
3869 case SCSPEC:
3870 if (IDENTIFIER_POINTER (t))
3871 fprintf (file, " `%s'", IDENTIFIER_POINTER (t));
3872 break;
3874 case CONSTANT:
3875 fprintf (file, " %s", GET_MODE_NAME (TYPE_MODE (TREE_TYPE (t))));
3876 if (TREE_CODE (t) == INTEGER_CST)
3877 fprintf (file,
3878 #if HOST_BITS_PER_WIDE_INT == 64
3879 #if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_INT
3880 " 0x%x%016x",
3881 #else
3882 #if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONG
3883 " 0x%lx%016lx",
3884 #else
3885 " 0x%llx%016llx",
3886 #endif
3887 #endif
3888 #else
3889 #if HOST_BITS_PER_WIDE_INT != HOST_BITS_PER_INT
3890 " 0x%lx%08lx",
3891 #else
3892 " 0x%x%08x",
3893 #endif
3894 #endif
3895 TREE_INT_CST_HIGH (t), TREE_INT_CST_LOW (t));
3896 break;
3897 }
3898 }
3899 \f
3900 /* This is not the ideal place to put these, but we have to get them out
3901 of c-lex.c because cp/lex.c has its own versions. */
3903 /* Return something to represent absolute declarators containing a *.
3904 TARGET is the absolute declarator that the * contains.
3905 TYPE_QUALS is a list of modifiers such as const or volatile
3906 to apply to the pointer type, represented as identifiers.
3908 We return an INDIRECT_REF whose "contents" are TARGET
3909 and whose type is the modifier list. */
3911 tree
3912 make_pointer_declarator (type_quals, target)
3913 tree type_quals, target;
3914 {
3915 return build1 (INDIRECT_REF, type_quals, target);
3916 }